Merge pull request #47178 from ktsakalozos/bug/worker-labels

Automatic merge from submit-queue (batch tested with PRs 48012, 47443, 47702, 47178)

Fix setting juju worker labels during deployment

**What this PR does / why we need it**: Allows for setting the labels of juju workers during deployment (eg inside a bundle)

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #47176

**Special notes for your reviewer**:

**Release note**:

```
Fix bug in setting Juju kubernetes-worker labels in bundle.yaml files. 
```

cluster/juju/layers/kubernetes-worker/reactive/kubernetes_worker.py

@@ -328,6 +328,7 @@ def start_worker(kube_api, kube_control, cni):
     set_state('kubernetes-worker.config.created')
     restart_unit_services()
     update_kubelet_status()
+    apply_node_labels()
     remove_state('kubernetes-worker.restart-needed')
 
 
@@ -415,7 +416,7 @@ def apply_node_labels():
 
     # Atomically set a label
     for label in user_labels:
-        _apply_node_label(label)
+        _apply_node_label(label, overwrite=True)
 
 
 def arch():