Endless loop when setting auto-upgrade.enable=yes in WSL

### **This is autogenerated. Please review and update as needed.**

## Describe the bug

**Command Name**
`az upgrade`

**Errors:**
```
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 121, in handler
return op(**command_args)
File "/opt/az/lib/python3.6/site-packages/azure/cli/command_modules/util/custom.py", line 90, in upgrade_version
exit_code = subprocess.call(apt_update_cmd)
File "/opt/az/lib/python3.6/subprocess.py", line 291, in call
p.kill()
File "/opt/az/lib/python3.6/subprocess.py", line 1610, in kill
self.send_signal(signal.SIGKILL)
File "/opt/az/lib/python3.6/subprocess.py", line 1600, in send_signal
os.kill(self.pid, sig)
PermissionError: [Errno 1] Operation not permitted
```

## 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 upgrade --all {} -y`

## Expected Behavior

## Environment Summary
```
Linux-5.10.16.3-microsoft-standard-WSL2-x86_64-with-debian-bullseye-sid, Ubuntu 20.04.3 LTS
Python 3.6.10
Installer: DEB

azure-cli 2.29.0 *

Extensions:
appservice-kube 0.1.20
connectedk8s 1.2.0
customlocation 0.1.2
k8s-configuration 1.0.0
k8s-extension 0.4.1
spring-cloud 2.3.0

```
## Additional Context