Support `connection_reset` with HTTP/1.1

[JamesNK]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

Kestrel metrics supports connection_reset error status for connections:

The connection was reset while there were active HTTP/2 or HTTP/3 streams on the connection.

However, there should be support for HTTP/1.1 request unexpectedly ending and causing this error.

Expected Behavior

@halter73 at open-telemetry/semantic-conventions#1548 (comment):

It feels like there ought to be an equivalent to this for HTTP/1.1, although looking at the code I see that there isn't right now. I know we ignore any non-user-canceled write errors, and ignore ConnectionResetException for HTTP/1.1 reads if they're between requests, but what if we get an exception like that while reading HTTP/1.1 request headers? Or mid request body? I know we'll call Log.RequestProcessingError with the exception, but it looks like it might be treated as a graceful ConnectionEndReason.TransportCompleted for open telemetry purposes.

Steps To Reproduce

No response

Exceptions (if any)

No response

.NET Version

No response

Anything else?

No response