Merge pull request #132145 from inkel/inkel/client-go/improve-bearerauthrt-roundtrip-perf

fix(client): Concatenate string instead of using `fmt.Sprintf`

staging/src/k8s.io/client-go/transport/round_trippers.go

@@ -319,7 +319,7 @@ func (rt *bearerAuthRoundTripper) RoundTrip(req *http.Request) (*http.Response,
 			token = refreshedToken.AccessToken
 		}
 	}
-	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token))
+	req.Header.Set("Authorization", "Bearer "+token)
 	return rt.rt.RoundTrip(req)
 }