Issue #3477671 by quietone: Fix VariableComment.Missing in core/tests

core/phpcs.xml.dist

...upal/FunctionalTests/DefaultContent/ContentImportTest.php

...alTests/Installer/InstallerExistingConfigNoConfigTest.php

...staller/InstallerExistingConfigProfileHookInstallTest.php

...tests/Drupal/KernelTests/Core/Action/DeleteActionTest.php

core/tests/Drupal/KernelTests/Core/Plugin/PluginTestBase.php

...KernelTests/Core/Recipe/EntityMethodConfigActionsTest.php

core/tests/Drupal/KernelTests/Core/Recipe/InputTest.php

core/tests/Drupal/KernelTests/Core/Theme/RegistryTest.php

core/tests/Drupal/Tests/Component/Annotation/PluginTest.php

...pal/Tests/Composer/Plugin/Scaffold/ScaffoldTestResult.php

...Drupal/Tests/Core/Asset/LibraryDiscoveryCollectorTest.php

...ts/Drupal/Tests/Core/Asset/LibraryDiscoveryParserTest.php

core/tests/Drupal/Tests/Core/Common/TagsTest.php

...pal/Tests/Core/Config/Entity/ConfigEntityBaseUnitTest.php

...s/Drupal/Tests/Core/Controller/ControllerResolverTest.php

...s/Core/Entity/KeyValueStore/KeyValueEntityStorageTest.php

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

.../tests/Drupal/Tests/Core/Form/ConfigFormBaseTraitTest.php

core/tests/Drupal/Tests/Core/Logger/LoggerChannelTest.php