Issue #2817835 by timmillwood, Sam152, alexpott: When enabling moderation apply a relative state

core/modules/content_moderation/src/EntityOperations.php

...on/src/Plugin/Field/FieldWidget/ModerationStateWidget.php

...eration/src/Plugin/Field/ModerationStateFieldItemList.php

..._moderation/src/Plugin/WorkflowType/ContentModeration.php

...ules/content_moderation/src/StateTransitionValidation.php

...oderation/tests/src/Kernel/ContentModerationStateTest.php

.../content_moderation/tests/src/Kernel/InitialStateTest.php

...ion/tests/src/Kernel/ModerationStateFieldItemListTest.php

core/modules/workflows/src/Entity/Workflow.php

core/modules/workflows/src/Plugin/WorkflowTypeBase.php

core/modules/workflows/src/WorkflowInterface.php

core/modules/workflows/src/WorkflowTypeInterface.php

...modules/workflows/tests/src/Functional/WorkflowUiTest.php

core/modules/workflows/tests/src/Unit/WorkflowTest.php