az datafactory trigger wait is failing

## Describe the bug

The `az datafactory trigger start` is failing as well with a "Bad request error".

**Command Name**
`az datafactory trigger wait
Extension Name: datafactory. Version: 0.5.0.`

**Errors:**
```
The command failed with an unexpected error. Here is the traceback:
'NoneType' object has no attribute 'get'
Traceback (most recent call last):
File "/opt/az/lib/python3.6/site-packages/knack/cli.py", line 231, in invoke
cmd_result = self.invocation.execute(args)
File "/opt/az/lib/python3.6/site-packages/azure/cli/core/commands/__init__.py", line 657, in execute
raise ex
File "/opt/az/lib/python3.6/site-packages/azure/cli/core/commands/__init__.py", line 720, in _run_jobs_serially
results.append(self._run_job(expanded_arg, cmd_copy))
File "/opt/az/lib/python3.6/site-packages/azure/cli/core/commands/__init__.py", line 691, in _run_job
result = cmd_copy(params)
File "/opt/az/lib/python3.6/site-packages/azure/cli/core/commands/__init__.py", line 328, in __call__
return self.handler(*args, **kwargs)
File "/opt/az/lib/python3.6/site-packages/azure/cli/core/commands/command_operation.py", line 428, in handler
provisioning_state = self._get_provisioning_state(instance)
File "/opt/az/lib/python3.6/site-packages/azure/cli/core/commands/command_operation.py", line 468, in _get_provisioning_state
provisioning_state = additional_properties.get('provisioningState')
AttributeError: 'NoneType' object has no attribute 'get'

```

## To Reproduce:
Steps to reproduce the behavior. Note that argument values have been redacted, as they may contain sensitive information.

- _Put any pre-requisite steps here..._
- `az datafactory trigger wait --factory-name {} --resource-group {} --name {} --created`

## Expected Behavior

## Environment Summary
```
Linux-5.11.0-31-generic-x86_64-with-debian-bullseye-sid
Python 3.6.10
Installer: DEB

azure-cli 2.24.2 *

Extensions:
subscription 0.1.4
azure-devops 0.18.0
datafactory 0.5.0
costmanagement 0.1.1
logic 0.1.2

```
## Additional Context