Fix TrustedHostMiddleware Handling for WebSocket Connections

[Massakera]

Summary

This PR addresses a runtime exception encountered when making WebSocket requests without a Host header or with an invalid Host header, resulting in a RuntimeError due to an inappropriate response type. The existing TrustedHostMiddleware does not properly handle WebSocket connections in such scenarios, attempting to send an HTTP response where a WebSocket response is expected.

fix #2420

Checklist

• I understand that this PR may be closed in case there was no previous discussion. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.

[Kludex]

Since this is not an issue anymore, I'll close this PR.

Thanks anyway.