Merge branch '3317769-cke5-entity-link-suggestions-11.x' into '11.x'

core/config/schema/core.entity.schema.yml

core/core.services.yml

core/drupalci.yml

...Validation/Constraint/ConfigExistsConstraintValidator.php

core/lib/Drupal/Core/Entity/Entity/EntityLinkSuggester.php

...lib/Drupal/Core/Entity/Entity/EntityLinkSuggesterForm.php

...rupal/Core/Entity/Entity/EntityLinkSuggesterInterface.php

...pal/Core/Entity/Entity/EntityLinkSuggesterListBuilder.php

core/lib/Drupal/Core/Entity/EntityLinkTargetInterface.php

core/lib/Drupal/Core/Entity/entity.api.php

core/lib/Drupal/Core/Render/Element/Radios.php

core/misc/autocomplete.js

core/modules/ckeditor5/ckeditor5.ckeditor5.yml

core/modules/ckeditor5/ckeditor5.libraries.yml

core/modules/ckeditor5/ckeditor5.module

core/modules/ckeditor5/ckeditor5.routing.yml

core/modules/ckeditor5/config/schema/ckeditor5.schema.yml

core/modules/ckeditor5/css/entity-link-suggestions.css

...modules/ckeditor5/js/build/drupalEntityLinkSuggestions.js

core/modules/ckeditor5/js/build/drupalMedia.js