[Feature request] Omit a mandatory parameter if resource can be queried by List

For example:
There is a generated cmdlet, which matches API design, where HsmName and ResourceGroupName are mandatory.
```
Get-AzKeyVaultManagedHsmRegion -HsmName -ResourceGroupName [-SubscriptionId ]
[-DefaultProfile ] []
```
But we can list all HSMs by HsmName and then get its ResourceGroupName so that ResourceGroupName can be omitted in this case. That's one of CLI common design.
See
```
az keyvault region list --hsm-name
[--resource-group]
```

Proposal:
Autorest.PowerShell supports this as its built-in function.