Remove deprecated ConfigurablePluginInterface in favour of ConfigurableInterface

Problem/Motivation

\Drupal\views_bulk_operations\Action\ViewsBulkOperationsActionBase implements \Drupal\Component\Plugin\ConfigurablePluginInterface which was deprecated in Drupal 8.7.0.

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  Line   src/Action/ViewsBulkOperationsActionBase.php                                                                                                                  
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  17     Class Drupal\views_bulk_operations\Action\ViewsBulkOperationsActionBase implements 
         deprecated interface Drupal\Component\Plugin\ConfigurablePluginInterface:  
         Drupal\Component\Plugin\ConfigurablePluginInterface is deprecated                                                                                             
         in Drupal 8.7.0 and will be removed before Drupal 9.0.0. You should implement                                                                                 
         ConfigurableInterface and/or DependentPluginInterface directly as needed. If                                                                                  
         you implement ConfigurableInterface you may choose to implement                                                                                               
         ConfigurablePluginInterface in Drupal 8 as well for maximum compatibility,                                                                                    
         however this must be removed prior to Drupal 9.                                                                                                               
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To put this in some context, ConfigurablePluginInterface extends DependentPluginInterface, which contains the single method calculateDependencies(), and adds to it methods getConfiguration(), setConfiguration() and defaultConfiguration(). The new ConfigurableInterface, that deprecates ConfigurablePluginInterface, does not extend DependentPluginInterface, but only contains said configuration methods.

Proposed resolution

Replace ConfigurablePluginInterface with ConfigurableInterface in the implemens list of ViewsBulkOperationsActionBase.

Remaining tasks

1. Reach concencus about solution
2. Implement
3. Review
4. Commit

User interface changes

None.

API changes

Instead of ConfigurablePluginInterface, plugins extending ViewsBulkOperationsActionBase will now implement ConfigurableInterface. If they implement calculateDependencies, they should themselves declare to implement DependentPluginInterface.

Data model changes

None.

Original report by Graber

As in title. The ConfigurableInterface was introduced in Drupal core 8.7 so we'll have to wait with this until earlier core versions are no longer supported.