RecipeTestTrait doesn't respect altered schema by hook_config_schema_info_alter

Problem/Motivation

I'm running into an issue with \Drupal\FunctionalTests\Core\Recipe\RecipeTestTrait::applyRecipe while updating Drupal CMS for ECA 3.0 and Modeler API. See #3538494: Update ECA to 3.0, including Modeler API and BPMN.

The problem is that Modeler API defines third-party settings dynamically in the hook_config_schema_info_alter() which is working just fine in regular operation. But in the RecipeTestTrait it seems that the hook isn't dispatched before the config entities get imported, and therefore the schema is incomplete, and the config entities appear to be invalid. The same config entities are perfectly fine when validating them with config inspector, though.