Add SignalR WebSocket compression support

[dorthl]

Hello I am not a native English speaker The following content is from machine translation. Sorry

I noticed that in 6.0-preview5 WebSocket has added compression support #32600 (#32600)

But in SignalR, because WebSocketOptions did not add related options, I couldn’t use it.

What is the reason?

[davidfowl]

Other priorities. We'll look into it for .NET 7 though.

[dorthl]

Okay, thank you, but this one is really too late, right?