Rename systemd module to systemd_service (#11396)

Signed-off-by: tu1h <lihai.tu@daocloud.io>

roles/etcd/handlers/main.yml

@@ -3,7 +3,7 @@
   import_tasks: backup.yml
 
 - name: Etcd | reload systemd
-  systemd:
+  systemd_service:
     daemon_reload: true
   listen:
     - Restart etcd

roles/etcd/tasks/configure.yml

@@ -68,7 +68,7 @@
   when: is_etcd_master and etcd_events_cluster_setup
 
 - name: Configure | reload systemd
-  systemd:
+  systemd_service:
     daemon_reload: true
   when: is_etcd_master