Issue #2572613 by Malevi4, idebr, pfrenssen, Mile23, RajeevK: Fix 'Drupal.Array.Array.CommaLastItem' coding standard

Issue #2898886 by Sam152, timmillwood: ContentModerationConfigureForm should use inline list in place of concatenated markup

Issue #2898913 by Sam152, andrewmacpherson, Wim Leers: Review a11y concerns in ContentModerationConfigureForm

Issue #2896722 by Sam152, Wim Leers, tim.plunkett, larowlan, timmillwood: Leverage PluginWithFormsInterface to encapsulate @WorkflowType schema and clean up state/transition form methods