--id description is ambiguous for Managed HSMs

## Describe the bug

As of version 2.13.0, the CLI says of `az keyvault security-domain download --id`:

```
Id of the HSM.
```

That's not very helpful, given ID is pretty overloaded. I tried the resource ID to no avail (e.g. /subscriptions/{guid}...). Could you clarify what this is supposed to be?

**Command Name**
`az keyvault security-domain download`

**Errors:**
```
security_domain_download() got an unexpected keyword argument 'vault_base_url'
```

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

- `az keyvault security-domain download --help`

## Expected Behavior

The help clearly defines what the `--id` value should be.

## Environment Summary
```
Linux-4.19.128-microsoft-standard-x86_64-with-debian-buster-sid
Python 3.6.10
Installer: DEB

azure-cli 2.13.0

```
## Additional Context