fix(disruption): Skip internal LB monitor on Hypershift

The internal load balancer monitor is not applicable to Hypershift
clusters and causes test failures. This change skips the deployment
of the internal LB monitor on Hypershift.

Author: wangke19

pkg/monitortests/kubeapiserver/disruptioninclusterapiserver/monitortest.go

@@ -114,6 +114,11 @@ func (i *InvariantInClusterDisruption) createDeploymentAndWaitToRollout(ctx cont
 }
 
 func (i *InvariantInClusterDisruption) createInternalLBDeployment(ctx context.Context, apiIntHost string) error {
+	// Don't start internal LB deployment on hypershift
+	if i.controlPlaneNodes == 0 {
+		return nil
+	}
+
 	deploymentObj := resourceread.ReadDeploymentV1OrDie(internalLBDeploymentYaml)
 	deploymentObj.SetNamespace(i.namespaceName)
 	deploymentObj.Spec.Template.Spec.Containers[0].Env[0].Value = apiIntHost