add support for using ansible 2.10.x for deploying kubespray (#7600)

* add support for using ansible 2.10.x for deploying kubespray

* move dns-autoscaler-clusterrole{binding}.yml to files/ folder

* note that ansible 2.10 is now experimentally supported

* coredns: move files to templates like before #4341

roles/kubernetes-apps/ansible/templates/coredns-clusterrole.yml.j2

@@ -0,0 +1,25 @@
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  labels:
+    kubernetes.io/bootstrapping: rbac-defaults
+    addonmanager.kubernetes.io/mode: Reconcile
+  name: system:coredns
+rules:
+  - apiGroups:
+      - ""
+    resources:
+      - endpoints
+      - services
+      - pods
+      - namespaces
+    verbs:
+      - list
+      - watch
+  - apiGroups:
+      - ""
+    resources:
+      - nodes
+    verbs:
+      - get