Feature Request: Add support for Managed Identities for Azure File Share over SMB

### Preconditions

- [x] No need to upgrade Python SDK or the Python SDK is ready.

### Related command

_No response_

### Resource Provider

Microsoft.App/managedEnvironments

### Description of Feature or Work Requested

Following the recent support for Managed Identities for Azure File Shares SMB (ref: https://azure.microsoft.com/en-us/updates/?id=562350), I'd like to see that feature added to the command `az containerapp env storage`.

### Minimum API Version Required

N/A

### Swagger PR link / SDK link

N/A

### Request Example

```
az containerapp env storage set --access-mode {ReadOnly, ReadWrite}
--account-name --azure-file-account-name
--azure-file-share-name --file-share
--name
--resource-group
--storage-name
[--acquire-policy-token]
[--auth-mode {StorageAccountKey, ManagedIdentity}]
[--azure-file-account-key --storage-account-key]
[--change-reference]
[--identity {system, }
[--no-wait]
```

### Target Date

N/A

### PM Contact

N/A

### Engineer Contact

N/A

### Additional context

Feature request on Azure Container Apps: https://github.com/microsoft/azure-container-apps/issues/1717