Use client generator to generate all k8s clients and add respective client-go metrics (#2668)

* Define client generator to generate all k8s clients
* Increase QPS and burst values
* Capture client-go metrics
* Support for controller runtime metrics

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

pkg/controller/api_test.go

@@ -503,7 +503,8 @@ func TestMain(m *testing.M) {
 		return
 	}
 
-	_, kubeClient, _, _, err := crd.GetKubernetesClient()
+	clientGen := crd.NewClientGenerator()
+	kubeClient, err := clientGen.GetKubernetesClient()
 	panicIf(err)
 
 	// testNS isolation for running multiple CI builds concurrently.