Merge pull request #47170 from ktsakalozos/bug/restart

Automatic merge from submit-queue (batch tested with PRs 47860, 47170)

Fix restart action on juju kubernetes-master

**What this PR does / why we need it**: Restart action of kubernetes-master of Juju is not functioning. 

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes https://github.com/juju-solutions/bundle-canonical-kubernetes/issues/299

**Special notes for your reviewer**:

**Release note**:

```
Fix: Restart action of juju's kubernetes-master restarts the respective snap based services
```

cluster/juju/layers/kubernetes-master/actions/restart

@@ -4,14 +4,11 @@ set +ex
 
 # Restart the apiserver, controller-manager, and scheduler
 
-systemctl restart kube-apiserver
+systemctl restart snap.kube-apiserver.daemon
+action-set apiserver.status='restarted'
 
-action-set 'apiserver.status' 'restarted'
+systemctl restart snap.kube-controller-manager.daemon
+action-set controller-manager.status='restarted'
 
-systemctl restart kube-controller-manager
-
-action-set 'controller-manager.status' 'restarted'
-
-systemctl restart kube-scheduler
-
-action-set 'kube-scheduler.status' 'restarted'
+systemctl restart snap.kube-scheduler.daemon
+action-set kube-scheduler.status='restarted'