Merge pull request #65904 from deads2k/api-02-trackscheme

Automatic merge from submit-queue (batch tested with PRs 65946, 65904, 65913, 65906, 65920). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

track schemes by name for error reporting

Getting an error message about a type not being in the scheme is hard to fix if you don't know which scheme is failing.  This adds a name to the scheme which can be set during creation or can be set based on the calling stack.  If you use the old constructor a name is generated for you based on the stack.  Something like "k8s.io/client-go/dynamic/scheme.go:28" for instance.

Also moves a typer to its point of use.  This was debt from previous refactors which I noticed going through.

@kubernetes/sig-api-machinery-misc
@sttts

```release-note
NONE
```

Kubernetes-commit: 8e2fdb32bc84103b15310a221a375470bf567bdc

vendor/k8s.io/apimachinery/pkg/util/net/http.go

@@ -179,10 +179,8 @@ func FormatURL(scheme string, host string, port int, path string) *url.URL {
 }
 
 func GetHTTPClient(req *http.Request) string {
-	if userAgent, ok := req.Header["User-Agent"]; ok {
-		if len(userAgent) > 0 {
-			return userAgent[0]
-		}
+	if ua := req.UserAgent(); len(ua) != 0 {
+		return ua
 	}
 	return "unknown"
 }