`api.config.delete` allows deleting `global` asset library

I think it would be simpler to add an entity access control handler that forbid deleting that specific library

Added 🐛 Regex for asset library IDs probably not was intended Active and switched tack, because (ab)using that is probably not the best approach

Boring branch name, but LGTM.

Should we delete asset_library for ContentCreatorVisibleXbConfigEntityAccessControlHandler unit test and add a unit test for the new access control handler?

I think this tiny detail being special for the subclass and being tested in a functional test is sufficient.

Agreed with RTBC 👍 and the boring branch name 😂