Undo deprecation of UnpublishByKeyword and AssignOwnerNode action plugins

Adding 💬 Webform issue during enabling Fixed as a related issue as it seems the change is catching other people out

I think if these are useful independently without acftions UI module, then it makes sense for them to be in core - or at least I don't think moving to actions UI was the right approach in that case, since it shouldn't become a dependency for VBO or webform.

Had a quick check to see if the commit from 📌 Move some Action plugins to Action module Needs review would revert against 10.3.x and 10.4.x and it doesn't, so will require a bit of work. We can probably skip the migration/upgrade test changes and just bring the actions and their own test coverage back in.

ericgsmith → closed merge request !8865

ericgsmith → reopened merge request !8865

Opened https://git.drupalcode.org/project/drupal/-/merge_requests/8865 against 11.x and https://git.drupalcode.org/project/drupal/-/merge_requests/8866 against 10.4.x

I note that there was no existing test for AssignOwnerNode - do we need a test for this as part of this issue or a follow up (given we are just moving them back)?

Since the previous CR is published can we get a new one if we are un-deprecating these.