Better handling of errors when the config_context is loaded

[apast0r]

Environment

• Python version: 3.11
• Nautobot version: 2.4.2
• nautobot-plugin-nornir version: 2.1.0

Expected Behavior

Better handling of errors when the config is loaded.

Observed Behavior

Nornir play fails with a exception.

Steps to Reproduce

1. Don't configure the default secret_access_type for a platform
2. Launch a Golden Config backup job
3. See the Advanced tab of the job result.

Traceback:

Traceback (most recent call last):
  File "/opt/nautobot/.local/lib/python3.11/site-packages/nautobot_golden_config/jobs.py", line 173, in gc_repo_wrapper
    func(self, *args, **kwargs)
  File "/opt/nautobot/.local/lib/python3.11/site-packages/nautobot_golden_config/jobs.py", line 287, in run
    config_backup(self)
  File "/opt/nautobot/.local/lib/python3.11/site-packages/nautobot_golden_config/nornir_plays/config_backup.py", line 121, in config_backup
    replace_regex_dict[regex.platform.network_driver].append({"replace": regex.replace, "regex": regex.regex})
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/nautobot/.local/lib/python3.11/site-packages/nornir/init_nornir.py", line 71, in InitNornir
    inventory=load_inventory(config),
              ^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/nautobot/.local/lib/python3.11/site-packages/nornir/init_nornir.py", line 20, in load_inventory
    inv = inventory_plugin(**config.inventory.options).load()
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/nautobot/.local/lib/python3.11/site-packages/nautobot_plugin_nornir/plugins/inventory/nautobot_orm.py", line 205, in load
    host = self.create_host(device=device, cred=cred, params=self.params)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/nautobot/.local/lib/python3.11/site-packages/nautobot_plugin_nornir/plugins/inventory/nautobot_orm.py", line 265, in create_host
    username, password, secret (redacted) cred.get_device_creds(device=device)  # pylint:disable=unused-variable
                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/nautobot/.local/lib/python3.11/site-packages/nautobot_plugin_nornir/plugins/credentials/nautobot_secrets.py", line 139, in get_device_creds
    configured_access_type = _get_access_type_value(device)
                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/nautobot/.local/lib/python3.11/site-packages/nautobot_plugin_nornir/plugins/credentials/nautobot_secrets.py", line 44, in _get_access_type_value
    access_type_str = device_obj.get_config_context()["nautobot_plugin_nornir"]["secret_access_type"].upper()
                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^
KeyError: 'nautobot_plugin_nornir'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/local/lib/python3.11/site-packages/celery/app/trace.py", line 477, in trace_task
    R = retval = fun(*args, **kwargs)
                 ^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/celery/app/trace.py", line 760, in __protected_call__
    return self.run(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/nautobot/extras/jobs.py", line 1234, in run_job
    result = job(*args, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/nautobot/extras/jobs.py", line 160, in __call__
    return self.run(*args, **deserialized_kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/nautobot/.local/lib/python3.11/site-packages/nautobot_golden_config/jobs.py", line 178, in gc_repo_wrapper
    raise NornirNautobotException(error_msg) from error
nornir_nautobot.exceptions.NornirNautobotException: `E3001:` General Exception handler, original error message ```'nautobot_plugin_nornir'```