Merge pull request #21043 from openshift-cherrypick-robot/cherry-pick-20873-to-release-3.11

[release-3.11] Router metrics change to use http1 cockroach db matcher 

The GCP test has taken two hours and we need to make the 8PM ET build window.

Author: knobunc

pkg/router/metrics/metrics.go

@@ -132,7 +132,7 @@ func (l Listener) Listen() {
 	m := cmux.New(tcpl)
 
 	// match HTTP first
-	httpl := m.Match(cmux.HTTP1Fast())
+	httpl := m.Match(cmux.HTTP1())
 	go func() {
 		s := &http.Server{
 			Handler: handler,