Issue #2684095 by dawehner, amateescu: Convert field kernel tests to KernelTestBaseTNG

core/modules/comment/tests/src/Kernel/CommentItemTest.php

core/modules/datetime/tests/src/Kernel/DateTimeItemTest.php

...s/field/tests/src/Kernel/Boolean/BooleanFormatterTest.php

...odules/field/tests/src/Kernel/Boolean/BooleanItemTest.php

core/modules/field/tests/src/Kernel/BulkDeleteTest.php

...ules/field/tests/src/Kernel/ConfigFieldDefinitionTest.php

core/modules/field/tests/src/Kernel/DisplayApiTest.php

core/modules/field/tests/src/Kernel/Email/EmailItemTest.php

...ts/src/Kernel/EntityReference/EntityReferenceItemTest.php

core/modules/field/tests/src/Kernel/FieldAttachOtherTest.php

...modules/field/tests/src/Kernel/FieldAttachStorageTest.php

core/modules/field/tests/src/Kernel/FieldCrudTest.php

core/modules/field/tests/src/Kernel/FieldDataCountTest.php

.../modules/field/tests/src/Kernel/FieldImportChangeTest.php

.../modules/field/tests/src/Kernel/FieldImportCreateTest.php

.../modules/field/tests/src/Kernel/FieldImportDeleteTest.php

...field/tests/src/Kernel/FieldImportDeleteUninstallTest.php

core/modules/field/tests/src/Kernel/FieldKernelTestBase.php

core/modules/field/tests/src/Kernel/FieldStorageCrudTest.php

...les/field/tests/src/Kernel/FieldTypePluginManagerTest.php