Auth Listener - Update to work with alternate_name for non-IA and non-registration flows

All BE communication with auth where possible now takes place in the auth listener. An initial implementation is already in place but will need to be updated to accommodate latest legal name model changes.

**TODOs**
- [ ] Update all code flows related to processing of non-IA and non-registration queue messages for the auth listener to work with alternate names
- [ ] Update `test_update_entity` test in `test_worker.py`
- [ ] Any other misc updates required to get auth listener and relevant unit test working