Microsoft.ServicesBus Topic & Queue missing x-ms-mutability

Within the definitions of `SBTopicProperties` and `SBQueueProperties`, the properties `requiresDuplicateDetection`, `requiresSession` and `enablePartitioning` should have the following attribute added as they can't be updated once created.

```json
"x-ms-mutability": [
"create",
"read"
]
```

## Documentation References

> You can't enable or disable message sessions after the queue or subscription is created. You can only do so at the time of creating the queue or subscription.

https://docs.microsoft.com/en-us/azure/service-bus-messaging/enable-message-sessions

> You can't enable or disable duplicate detection after the queue or topic is created. You can only do so at the time of creating the queue or topic.

https://docs.microsoft.com/en-us/azure/service-bus-messaging/enable-duplicate-detection

> It's not possible to change the partitioning option on any existing queue or topic. You can only set the option when you create a queue or a topic.

https://docs.microsoft.com/en-us/azure/service-bus-messaging/enable-partitions

Search the Service Bus API specifications for the SBTopicProperties and SBQueueProperties definitions, then inspect requiresDuplicateDetection, requiresSession, and enablePartitioning. Confirm the documented immutability behavior in the linked references, add the specified create/read mutability metadata, and verify the generated specification reflects it.

Written by the indexing model from the issue text.