Invalid config schema breaks add_langcode_to_all_translatable_config db update

Problem/Motivation

After updating drupalwxt/wxt from 5.2.3 to 5.3.0, database update throws error while running add_langcode_to_all_translatable_config database update.

Steps to reproduce

1. Create a fresh new project using drupalwxt/wxt-project:5.2.3.
   composer create-project drupalwxt/wxt-project:5.2.3 site-wxt
2. Install Drupal.
   drush si
3. Update drupalwxt/wxt to 5.3.0
composer require drupalwxt/wxt:5.3.0 -W
4. Update database
   drush updb

Observe that add_langcode_to_all_translatable_config update fails with the following error:

 --------------- ----------------------------------------------------- --------------- ------------------------------------------------------------------------------- 
  Module          Update ID                                             Type            Description                                                                    
 --------------- ----------------------------------------------------- --------------- ------------------------------------------------------------------------------- 
  block_content   10300                                                 hook_update_n   10300 - Apply index to reusable column.                                        
  locale          10300                                                 hook_update_n   10300 - Add an index on locales_location on type and name.                     
  taxonomy        10100                                                 hook_update_n   10100 - Update entity definition to handle revision routes.                    
  block_content   revision_type                                         post-update     Update configuration for revision type.                                        
  editor          sanitize_image_upload_settings                        post-update     Clean up image upload settings.                                                
  filter          consolidate_filter_config                             post-update     Change filter_settings to type mapping.                                        
  node            set_node_type_description_and_help_to_null            post-update     Converts empty `description` and `help` in content types to NULL.              
  system          add_langcode_to_all_translatable_config               post-update     Adds a langcode to all simple config which needs it.                           
  system          amend_config_sync_readme_url                          post-update     Fix path in README.txt in CONFIG_SYNC_DIRECTORY.                               
  system          convert_empty_country_and_timezone_settings_to_null   post-update     Updates system.date config to NULL for empty country and timezone defaults.    
  system          mail_notification_setting                             post-update     Adds default value for the mail_notification config parameter.                 
  system          move_development_settings_to_keyvalue                 post-update     Move development settings from state to raw key-value storage.                 
  system          set_cron_logging_setting_to_boolean                   post-update     Fix system.cron:logging values to boolean.                                     
  taxonomy        set_new_revision                                      post-update     Re-save Taxonomy configurations with new_revision config.                      
  taxonomy        set_vocabulary_description_to_null                    post-update     Converts empty `description` in vocabularies to NULL.                          
  views           pager_heading                                         post-update     Adds a default pager heading.                                                  
  views           rendered_entity_field_cache_metadata                  post-update     Removes entity display cache metadata from views with rendered entity fields.  
  views           views_data_argument_plugin_id                         post-update     Post update configured views for entity reference argument plugin IDs.         
 --------------- ----------------------------------------------------- --------------- ------------------------------------------------------------------------------- 


 Do you wish to run the specified pending updates? (yes/no) [yes]:
 > 

>  [notice] Update started: block_content_update_10300
>  [notice] Update completed: block_content_update_10300
>  [notice] Update started: locale_update_10300
>  [notice] Update completed: locale_update_10300
>  [notice] Update started: taxonomy_update_10100
>  [notice] Added revision routes to Taxonomy Term entity type.
>  [notice] Update completed: taxonomy_update_10100
>  [notice] Update started: block_content_post_update_revision_type
>  [notice] Update completed: block_content_post_update_revision_type
>  [notice] Update started: editor_post_update_sanitize_image_upload_settings
>  [notice] Update completed: editor_post_update_sanitize_image_upload_settings
>  [notice] Update started: filter_post_update_consolidate_filter_config
>  [notice] Update completed: filter_post_update_consolidate_filter_config
>  [notice] Update started: node_post_update_set_node_type_description_and_help_to_null
>  [notice] Update completed: node_post_update_set_node_type_description_and_help_to_null
>  [notice] Update started: system_post_update_add_langcode_to_all_translatable_config
>  [notice] Processed 50 items of 213.
>  [notice] Processed 100 items of 213.
>  [notice] Processed 150 items of 213.
>  [notice] Processed 200 items of 213.
>  [error]  AssertionError: Failed on config name 'wxt_core.versions' in assert() (line 264 of /var/www/html/html/core/modules/system/system.post_update.php) #0 /var/www/html/html/core/modules/system/system.post_update.php(264): assert(false, 'Failed on confi...')
> #1 /var/www/html/vendor/drush/drush/src/Commands/core/UpdateDBCommands.php(280): system_post_update_add_langcode_to_all_translatable_config(Array)
> #2 /var/www/html/vendor/drush/drush/includes/batch.inc(257): Drush\Commands\core\UpdateDBCommands::updateDoOnePostUpdate('system_post_upd...', Array)
> #3 /var/www/html/vendor/drush/drush/includes/batch.inc(204): _drush_batch_worker()
> #4 /var/www/html/vendor/drush/drush/includes/batch.inc(75): _drush_batch_command('1')
> #5 /var/www/html/vendor/drush/drush/src/Commands/core/UpdateDBCommands.php(136): drush_batch_command('1')
> #6 [internal function]: Drush\Commands\core\UpdateDBCommands->process('1', Array)
> #7 /var/www/html/vendor/consolidation/annotated-command/src/CommandProcessor.php(276): call_user_func_array(Array, Array)
> #8 /var/www/html/vendor/consolidation/annotated-command/src/CommandProcessor.php(212): Consolidation\AnnotatedCommand\CommandProcessor->runCommandCallback(Array, Object(Consolidation\AnnotatedCommand\CommandData))
> #9 /var/www/html/vendor/consolidation/annotated-command/src/CommandProcessor.php(176): Consolidation\AnnotatedCommand\CommandProcessor->validateRunAndAlter(Array, Array, Object(Consolidation\AnnotatedCommand\CommandData))
> #10 /var/www/html/vendor/consolidation/annotated-command/src/AnnotatedCommand.php(391): Consolidation\AnnotatedCommand\CommandProcessor->process(Object(Symfony\Component\Console\Output\ConsoleOutput), Array, Array, Object(Consolidation\AnnotatedCommand\CommandData))
> #11 /var/www/html/vendor/symfony/console/Command/Command.php(326): Consolidation\AnnotatedCommand\AnnotatedCommand->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
> #12 /var/www/html/vendor/symfony/console/Application.php(1096): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
> #13 /var/www/html/vendor/symfony/console/Application.php(324): Symfony\Component\Console\Application->doRunCommand(Object(Consolidation\AnnotatedCommand\AnnotatedCommand), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
> #14 /var/www/html/vendor/symfony/console/Application.php(175): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
> #15 /var/www/html/vendor/drush/drush/src/Runtime/Runtime.php(110): Symfony\Component\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
> #16 /var/www/html/vendor/drush/drush/src/Runtime/Runtime.php(40): Drush\Runtime\Runtime->doRun(Array, Object(Symfony\Component\Console\Output\ConsoleOutput))
> #17 /var/www/html/vendor/drush/drush/drush.php(139): Drush\Runtime\Runtime->run(Array)
> #18 /var/www/html/vendor/drush/drush/drush(4): require('/var/www/html/v...')
> #19 /var/www/html/vendor/bin/drush(119): include('/var/www/html/v...')
> #20 {main}. 
> AssertionError: Failed on config name 'wxt_core.versions' in /var/www/html/html/core/modules/system/system.post_update.php on line 264 #0 /var/www/html/html/core/modules/system/system.post_update.php(264): assert(false, 'Failed on confi...')
> #1 /var/www/html/vendor/drush/drush/src/Commands/core/UpdateDBCommands.php(280): system_post_update_add_langcode_to_all_translatable_config(Array)
> #2 /var/www/html/vendor/drush/drush/includes/batch.inc(257): Drush\Commands\core\UpdateDBCommands::updateDoOnePostUpdate('system_post_upd...', Array)
> #3 /var/www/html/vendor/drush/drush/includes/batch.inc(204): _drush_batch_worker()
> #4 /var/www/html/vendor/drush/drush/includes/batch.inc(75): _drush_batch_command('1')
> #5 /var/www/html/vendor/drush/drush/src/Commands/core/UpdateDBCommands.php(136): drush_batch_command('1')
> #6 [internal function]: Drush\Commands\core\UpdateDBCommands->process('1', Array)
> #7 /var/www/html/vendor/consolidation/annotated-command/src/CommandProcessor.php(276): call_user_func_array(Array, Array)
> #8 /var/www/html/vendor/consolidation/annotated-command/src/CommandProcessor.php(212): Consolidation\AnnotatedCommand\CommandProcessor->runCommandCallback(Array, Object(Consolidation\AnnotatedCommand\CommandData))
> #9 /var/www/html/vendor/consolidation/annotated-command/src/CommandProcessor.php(176): Consolidation\AnnotatedCommand\CommandProcessor->validateRunAndAlter(Array, Array, Object(Consolidation\AnnotatedCommand\CommandData))
> #10 /var/www/html/vendor/consolidation/annotated-command/src/AnnotatedCommand.php(391): Consolidation\AnnotatedCommand\CommandProcessor->process(Object(Symfony\Component\Console\Output\ConsoleOutput), Array, Array, Object(Consolidation\AnnotatedCommand\CommandData))
> #11 /var/www/html/vendor/symfony/console/Command/Command.php(326): Consolidation\AnnotatedCommand\AnnotatedCommand->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
> #12 /var/www/html/vendor/symfony/console/Application.php(1096): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
> #13 /var/www/html/vendor/symfony/console/Application.php(324): Symfony\Component\Console\Application->doRunCommand(Object(Consolidation\AnnotatedCommand\AnnotatedCommand), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
> #14 /var/www/html/vendor/symfony/console/Application.php(175): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
> #15 /var/www/html/vendor/drush/drush/src/Runtime/Runtime.php(110): Symfony\Component\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
> #16 /var/www/html/vendor/drush/drush/src/Runtime/Runtime.php(40): Drush\Runtime\Runtime->doRun(Array, Object(Symfony\Component\Console\Output\ConsoleOutput))
> #17 /var/www/html/vendor/drush/drush/drush.php(139): Drush\Runtime\Runtime->run(Array)
> #18 /var/www/html/vendor/drush/drush/drush(4): require('/var/www/html/v...')
> #19 /var/www/html/vendor/bin/drush(119): include('/var/www/html/v...')
> #20 {main}
>  [warning] Drush command terminated abnormally.

In ProcessBase.php line 171:
                                                                                                                                                      
  Unable to decode output into JSON: Syntax error                                                                                                     
                                                                                                                                                      
  AssertionError: Failed on config name 'wxt_core.versions' in assert() (line 264 of /var/www/html/html/core/modules/system/system.post_update.php).  

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes