Issue #3271094 by Wim Leers, lauriii, xjm, catch: Move Media CKEditor 4 integration into CKEditor

core/.stylelintrc.json

core/modules/ckeditor/ckeditor.libraries.yml

...ckeditor/css/plugins/drupalmedia/ckeditor.drupalmedia.css

core/modules/ckeditor/js/ckeditor.drupalmedia.theme.es6.js

core/modules/ckeditor/js/ckeditor.drupalmedia.theme.js

core/modules/ckeditor/js/plugins/drupalmedia/plugin.es6.js

core/modules/ckeditor/js/plugins/drupalmedia/plugin.js

...odules/ckeditor/src/Plugin/CKEditorPlugin/DrupalMedia.php

...les/ckeditor/tests/src/FunctionalJavascript/MediaTest.php

core/modules/ckeditor5/ckeditor5.libraries.yml

core/modules/ckeditor5/ckeditor5.libraries.yml.orig

core/modules/ckeditor5/js/media_embed_ckeditor5.theme.es6.js

core/modules/media/js/media_embed_ckeditor.theme.es6.js

core/modules/media/js/media_embed_ckeditor.theme.js

core/modules/media/media.libraries.yml

core/modules/media/media.module

core/modules/media/src/Form/EditorMediaDialog.php

.../tests/modules/media_test_embed/media_test_embed.info.yml

...ia/tests/modules/media_test_embed/media_test_embed.module

...a_test_embed/src/Controller/TestMediaFilterController.php