Removed DEPRECATED --logtostderr from metrics-server

The --logtostderr is deprecated.

https://github.com/kubernetes/enhancements/tree/master/keps/sig-instrumentation/2845-deprecate-klog-specific-flags-in-k8s-components

roles/kubernetes-apps/metrics_server/templates/metrics-server-deployment.yaml.j2

@@ -32,7 +32,6 @@ spec:
         image: {{ metrics_server_image_repo }}:{{ metrics_server_image_tag }}
         imagePullPolicy: {{ k8s_image_pull_policy }}
         args:
-        - --logtostderr
         - --cert-dir=/tmp
         - --secure-port={{ metrics_server_container_port }}
 {% if metrics_server_kubelet_preferred_address_types %}