Issue #2919482: Clean code - better naming of $entity_type

src/Controller/WorkflowTransitionListController.php

src/Element/WorkflowTransitionTimestamp.php

src/Entity/WorkflowManager.php

src/Entity/WorkflowScheduledTransition.php

src/Entity/WorkflowTransitionInterface.php

src/Plugin/Block/WorkflowTransitionBlock.php

src/Plugin/Field/FieldFormatter/WorkflowDefaultFormatter.php

...alidation/Constraint/WorkflowFieldConstraintValidator.php

src/Plugin/views/filter/WorkflowState.php

src/WorkflowTransitionListBuilder.php

workflow.form.inc