Fix race in RST_STREAM_IncompleteRequest_AdditionalWindowUpdateFrame_ConnectionAborted (#57450)

* Unquarantine RST_STREAM_IncompleteRequest_AdditionalWindowUpdateFrame_ConnectionAborted

There was a race between early-sending the response headers and sending the goaway for the aborted connection.

Fixes #53744

* Keep test quarantined

Author: amcasey

src/Servers/Kestrel/test/InMemory.FunctionalTests/Http2/Http2ConnectionTests.cs

@@ -3604,10 +3604,11 @@ public async Task RST_STREAM_IncompleteRequest_AdditionalWindowUpdateFrame_Conne
         await SendDataAsync(1, new byte[1], endStream: false);
         await SendRstStreamAsync(1);
         await SendWindowUpdateAsync(1, 1024);
-        tcs.TrySetResult();
 
         await WaitForConnectionErrorAsync<Http2ConnectionErrorException>(ignoreNonGoAwayFrames: false, expectedLastStreamId: 1,
             Http2ErrorCode.STREAM_CLOSED, CoreStrings.FormatHttp2ErrorStreamAborted(Http2FrameType.WINDOW_UPDATE, 1));
+
+        tcs.TrySetResult(); // Don't let the response start until after the abort
     }
 
     [Fact]