Rename master to control plane - non-breaking changes only (#11394)

K8s is moving away from the "master" terminology, so kubespray should follow the same naming conventions. See 65d886bb30/sig-architecture/naming/recommendations/001-master-control-plane.md

roles/etcd/tasks/refresh_config.yml

@@ -5,7 +5,9 @@
     dest: /etc/etcd.env
     mode: "0640"
   notify: Restart etcd
-  when: is_etcd_master and etcd_cluster_setup
+  when:
+    - ('etcd' in group_names)
+    - etcd_cluster_setup
 
 - name: Refresh config | Create etcd-events config file
   template:
@@ -13,4 +15,6 @@
     dest: /etc/etcd-events.env
     mode: "0640"
   notify: Restart etcd-events
-  when: is_etcd_master and etcd_events_cluster_setup
+  when:
+    - ('etcd' in group_names)
+    - etcd_events_cluster_setup