Registering or Unregistering provider Microsoft.AVS

### Describe the bug

Trying to register "Microsoft.AVS" for my subscription via the portal but it gets stuck in registering and eventually gives this kind of message "Unregister' operation check timed out on Resource Provider 'microsoft.AVS', please refresh resource providers list to check for registration status".

### Related command

az provider register --namespace Microsoft.AVS --verbose --wait

### Errors

no error, but very slow (hours? days?)

### Issue script & Debug output

```
az provider list --query "[?registrationState=='Unregistering']" -o table 3s ☁
Namespace RegistrationState RegistrationPolicy
------------- ------------------- --------------------
Microsoft.AVS Unregistering RegistrationRequired
```

### Expected behavior

Provider should be registered in the subscription

### Environment Summary
```
{
"azure-cli": "2.57.0",
"azure-cli-core": "2.57.0",
"azure-cli-telemetry": "1.1.0",
"extensions": {
"azure-devops": "0.26.0"
}
}
````
### Additional context

Identical Symptoms to [28203](https://github.com/Azure/azure-cli/issues/28203), just different provider