Issue #2111823 by amateescu, dawehner: Convert field_ui / Entity local tasks to YAML definitions.

core/lib/Drupal/Core/Entity/Annotation/EntityType.php

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

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

...stom_block/lib/Drupal/custom_block/Entity/CustomBlock.php

core/modules/comment/lib/Drupal/comment/Entity/Comment.php

...s/comment/lib/Drupal/comment/Tests/CommentNonNodeTest.php

...b/Drupal/config_translation/ConfigFieldInstanceMapper.php

core/modules/contact/contact.local_tasks.yml

core/modules/contact/contact.module

core/modules/contact/lib/Drupal/contact/Entity/Message.php

core/modules/field_ui/field_ui.local_tasks.yml

core/modules/field_ui/field_ui.module

core/modules/field_ui/field_ui.services.yml

...eld_ui/lib/Drupal/field_ui/Access/FormModeAccessCheck.php

...eld_ui/lib/Drupal/field_ui/Access/ViewModeAccessCheck.php

.../modules/field_ui/lib/Drupal/field_ui/DisplayOverview.php

...ules/field_ui/lib/Drupal/field_ui/DisplayOverviewBase.php

...les/field_ui/lib/Drupal/field_ui/Form/FieldDeleteForm.php

...dules/field_ui/lib/Drupal/field_ui/Form/FieldEditForm.php

...eld_ui/lib/Drupal/field_ui/Form/FieldInstanceEditForm.php