[1.3] Change logging needs to handle models with no associated serializer

[glennmatthews]

Environment

• Python version:
• Nautobot version: next b44947c

Steps to Reproduce

1. Have a model that is change-logged (implements to_objectchange or inherits from ChangeLoggedModel) but has no associated REST API serializer
2. Create, update, or delete an instance of this model.

Expected Behavior

Change logging to succeed.

Observed Behavior

...
  File "/source/nautobot/extras/signals.py", line 72, in _handle_changed_object
    objectchange = instance.to_objectchange(action)
  File "/source/nautobot/extras/models/change_logging.py", line 43, in to_objectchange
    object_data_v2=serialize_object_v2(self),
  File "/source/nautobot/utilities/utils.py", line 152, in serialize_object_v2
    serializer_class = get_serializer_for_model(obj.__class__)
  File "/source/nautobot/utilities/api.py", line 29, in get_serializer_for_model
    "Could not determine serializer for {}.{} with prefix '{}'".format(app_name, model_name, prefix)
nautobot.core.api.exceptions.SerializerNotFound: Could not determine serializer for extras.Job with prefix ''

IMHO the to_objectchange implementation needs to catch the SerializerNotFound exception, possibly log a warning message, and gracefully recover.

[glennmatthews]

Issue introduced by #1389, hence this only applies to next at this time.

[bryanculver]

Merged into next.