Rename systemd module to systemd_service (#11396)

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

roles/bootstrap-os/tasks/clearlinux.yml

@@ -7,7 +7,7 @@
     state: present
 
 - name: Make sure docker service is enabled
-  systemd:
+  systemd_service:
     name: docker
     masked: false
     enabled: true

roles/bootstrap-os/tasks/flatcar.yml

@@ -26,7 +26,7 @@
     ansible_interpreter_python_fallback: "{{ ansible_interpreter_python_fallback + [ '/opt/bin/python' ] }}"
 
 - name: Disable auto-upgrade
-  systemd:
+  systemd_service:
     name: locksmithd.service
     masked: true
     state: stopped