Add metrics-server addon switcher in k8s models

Related story: https://mirantis.jira.com/browse/PROD-24599

Change-Id: I040ba6e5fa7eac552bc9c6fb7f7738440d1fc26c
diff --git a/classes/cluster/k8s-ha-calico/kubernetes/init.yml b/classes/cluster/k8s-ha-calico/kubernetes/init.yml
index 8181eaf..51345be 100644
--- a/classes/cluster/k8s-ha-calico/kubernetes/init.yml
+++ b/classes/cluster/k8s-ha-calico/kubernetes/init.yml
@@ -83,6 +83,7 @@
     kubernetes_externaldns_enabled: false
     kubernetes_metallb_enabled: false
     kubernetes_ingressnginx_enabled: false
+    kubernetes_metrics_server_enabled: false
 
   linux:
     network: