Allow providers to update pod statuses

We had added an optimization that made it so we dedupe pod status updates
from the provider. This ignored two subfields that could be updated along
with status.

Because the details of subresource updating is a bit API server centric,
I wrote an envtest which checks for this behaviour.

Signed-off-by: Sargun Dhillon <sargun@sargun.me>

node/pod.go

@@ -215,14 +215,7 @@ func (pc *PodController) updatePodStatus(ctx context.Context, podFromKubernetes
 	}
 	kPod := obj.(*knownPod)
 	kPod.Lock()
-
 	podFromProvider := kPod.lastPodStatusReceivedFromProvider.DeepCopy()
-	if cmp.Equal(podFromKubernetes.Status, podFromProvider.Status) && podFromProvider.DeletionTimestamp == nil {
-		kPod.lastPodStatusUpdateSkipped = true
-		kPod.Unlock()
-		return nil
-	}
-	kPod.lastPodStatusUpdateSkipped = false
 	kPod.Unlock()
 	// Pod deleted by provider due some reasons. e.g. a K8s provider, pod created by deployment would be evicted when node is not ready.
 	// If we do not delete pod in K8s, deployment would not create a new one.
@@ -326,9 +319,11 @@ func (pc *PodController) enqueuePodStatusUpdate(ctx context.Context, pod *corev1
 	kpod := obj.(*knownPod)
 	kpod.Lock()
 	if cmp.Equal(kpod.lastPodStatusReceivedFromProvider, pod) {
+		kpod.lastPodStatusUpdateSkipped = true
 		kpod.Unlock()
 		return
 	}
+	kpod.lastPodStatusUpdateSkipped = false
 	kpod.lastPodStatusReceivedFromProvider = pod
 	kpod.Unlock()
 	pc.syncPodStatusFromProvider.Enqueue(ctx, key)