Decide if the moderation controls form should set a revision log message.

Problem/Motivation

The @todo in question is in \Drupal\content_moderation\Form\EntityModerationForm::submitForm:

    // @todo should we just just be updating the content moderation state
    // entity? That would prevent setting the revision log.

Proposed resolution

Remaining tasks

Discuss and fix issue or remove @todo.

User interface changes

API changes

Data model changes