azure-ai-voicelive: unhandled websocket message type CLOSING results in error

- **Package Name**: azure-ai-voicelive
- **Package Version**: 1.1.0
- **Operating System**: linux
- **Python Version**: 3.12

**Describe the bug**
When integrated in a websocket, voicelive SDK has no logic to manage `CLOSING` as received websocket message type, only `CLOSE` and `CLOSED`. Other Azure service return closing, resulting in websocket errors. `CLOSING` is fairly common so I believe it should be included, specially since this service is made to be integrated in a websocket with others. You can find the relevant code here: https://github.com/Azure/azure-sdk-for-python/blob/main/sdk/voicelive/azure-ai-voicelive/azure/ai/voicelive/aio/_patch.py#L523

**To Reproduce**
Steps to reproduce the behavior:
1. Create the websocket
2. Make the other party return CLOSING
3. Results in error

**Expected behavior**
CLOSING message type should not error out. Either needs to be handled or ignored.

**Screenshots**
If applicable, add screenshots to help explain your problem.

**Additional context**
Our session id was: **sess_6Zxvf6tkDngFpn3CwcvbTE**
Please do not hesitate to reach out for more data points. Thank you.

Beginne in sdk/voicelive/azure-ai-voicelive/azure/ai/voicelive/aio/_patch.py bei der Behandlung von websocket-Nachrichten um Zeile 523. Reproduziere nach Möglichkeit eine CLOSING-Nachricht und verfolge, wie CLOSE und CLOSED behandelt werden. Als abgeschlossen gilt die Aufgabe, wenn CLOSING behandelt oder ignoriert wird, ohne einen websocket-Fehler zu erzeugen.

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