Add metrics_server_resizer option (#8018)

The addon-resizer container can reduce resource limits of cpu and
memory of metrics-server container in the pod, and that caused
OOMKilled.
In addition, the original metrics-server manifest doesn't contain
the addon-resizer container as [1].
So this adds metrics_server_resizer option to control the addon-resizer
container deployment and the default value is false to make it stable
for most environments.

[1]: 527679e5e8/manifests/base/deployment.yaml

inventory/sample/group_vars/k8s_cluster/addons.yml

@@ -14,6 +14,7 @@ registry_enabled: false
 
 # Metrics Server deployment
 metrics_server_enabled: false
+# metrics_server_resizer: false
 # metrics_server_kubelet_insecure_tls: true
 # metrics_server_metric_resolution: 15s
 # metrics_server_kubelet_preferred_address_types: "InternalIP"