Enable translation and revisioning for eventseries and eventinstance

...recurring_events_registration/src/Form/RegistrantForm.php

recurring_events.links.action.yml

recurring_events.links.task.yml

recurring_events.permissions.yml

recurring_events.routing.yml

src/Controller/EventController.php

src/Controller/EventInstanceController.php

src/Controller/EventSeriesController.php

src/Entity/EventInstance.php

src/Entity/EventSeries.php

src/EventInstanceHtmlRouteProvider.php

src/EventInstanceStorage.php

src/EventInstanceStorageInterface.php

src/EventInstanceTranslationHandler.php

src/EventSeriesHtmlRouteProvider.php

src/EventSeriesStorage.php

src/EventSeriesStorageInterface.php

src/EventSeriesTranslationHandler.php

src/Form/EventInstanceForm.php

src/Form/EventInstanceRevisionDeleteForm.php