Merge pull request #58584 from nashasha1/xdzhang/dns-autoscaler

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Fix autoscaler deployment bug

**What this PR does / why we need it**:
This PR add `selector` in yaml: dns-horizontal-autoscaler.yaml, and upgrade the `apiVersion` of `Deployment` to `apps/v1`

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

**Special notes for your reviewer**:

```release-note
None
```

cluster/addons/dns-horizontal-autoscaler/dns-horizontal-autoscaler.yaml

@@ -58,7 +58,7 @@ roleRef:
   apiGroup: rbac.authorization.k8s.io
 
 ---
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: kube-dns-autoscaler
@@ -68,6 +68,9 @@ metadata:
     kubernetes.io/cluster-service: "true"
     addonmanager.kubernetes.io/mode: Reconcile
 spec:
+  selector:
+    matchLabels:
+      k8s-app: kube-dns-autoscaler
   template:
     metadata:
       labels: