Convert expectation-less test mocks to stubs - batch 1

Problem/Motivation

PHPUnit 12.5.0+ is changing the way that mock objects work:

• Mock objects that do not configure expectations should be converted to stubs. Otherwise, they throw a notice: No expectations were configured for the mock object for \Drupal\comment\CommentManagerInterface. You should refactor your test code and use a test stub instead.
• $this->any() is deprecated. It was equivalent to having no expectation, in which case the object should be a stub (see the previous bullet) or a more exact number of expectations should be added.
• with() is deprecated for stubs because it was deemed to be equally pointless.

Steps to reproduce

1. Require PHPUnit 12 with Composer.
2. Fix compatibility issues with PHPUnit 12 by applying this patch.
3. Run the Unit tests for a module with --display-phpunit-notices --display-phpunit-deprecations.
4. Observe the PHPUnit notices that occur.

Proposed resolution

This issue will fix mocks in a number of Core modules where only a single class was affected per module. These include:

• announcements_feed
• big_pipe
• breakpoint
• ckeditor5
• content_moderation
• datetime
• jsonapi
• menu_link_content
• mysql
• navigation
• responsive_image
• shortcut
• sqlite
• workspaces

Remaining tasks

Information on how to review these issues and the types of changes you're likely to find in them is included in the parent issue's comments.

User interface changes

Introduced terminology

API changes

Data model changes

Release notes snippet