Updating apiserver Endpoints management to set skip-mirror label

This will ensure that the self-referential kubernetes Endpoints
resources is not mirrored by the EndpointSliceMirroring controller.

pkg/master/reconcilers/mastercount.go

@@ -76,6 +76,11 @@ func (r *masterCountEndpointReconciler) ReconcileEndpoints(serviceName string, i
 			},
 		}
 	}
+
+	// Don't use the EndpointSliceMirroring controller to mirror this to
+	// EndpointSlices. This may change in the future.
+	skipMirrorChanged := setSkipMirrorTrue(e)
+
 	if errors.IsNotFound(err) {
 		// Simply create non-existing endpoints for the service.
 		e.Subsets = []corev1.EndpointSubset{{
@@ -99,7 +104,8 @@ func (r *masterCountEndpointReconciler) ReconcileEndpoints(serviceName string, i
 		_, err = r.epAdapter.Update(metav1.NamespaceDefault, e)
 		return err
 	}
-	if ipCorrect && portsCorrect {
+
+	if !skipMirrorChanged && ipCorrect && portsCorrect {
 		return r.epAdapter.EnsureEndpointSliceFromEndpoints(metav1.NamespaceDefault, e)
 	}
 	if !ipCorrect {