bump to dashboard 2.0.0 with metrics scrapper support (#5821)

* bump to dashboard 2.0 rc6 with metrics scrapper

* fix missing yaml seperator making Replicaset complaining about missing ServiceAccount

* unwanted legay gross hack forgot to remove before

* no  need namespace on CrBinding

* bump to 2.0.0 release

* remove dashboard_metrics_scrapper_enabled

roles/kubernetes-apps/ansible/tasks/dashboard.yml

@@ -11,7 +11,7 @@
 - name: Kubernetes Apps | Start dashboard
   kube:
     name: "{{ item.item.name }}"
-    namespace: "kube-system"
+    namespace: "{{ dashboard_namespace }}"
     kubectl: "{{ bin_dir }}/kubectl"
     resource: "{{ item.item.type }}"
     filename: "{{ kube_config_dir }}/{{ item.item.file }}"