Issue #3244802 by andypost, Spokje, catch, dww: Remove BC layers in entity system

core/core.services.yml

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

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

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

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

core/lib/Drupal/Core/Entity/Query/Sql/Query.php

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

...eprecated_storage/entity_test_deprecated_storage.info.yml

...eprecated_storage/src/Storage/DeprecatedEntityStorage.php

.../tests/Drupal/KernelTests/Core/Entity/EntityQueryTest.php

.../Drupal/Tests/Core/Entity/EntityBundleAccessCheckTest.php

...Drupal/Tests/Core/Entity/EntityStorageDeprecationTest.php

core/tests/Drupal/Tests/Core/Entity/EntityTypeTest.php