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>.

 Merge kube-dns templates into a single file

**What this PR does / why we need it**: Merge all of the kube-dns cluster yamls into a single file.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #42832

**Special notes for your reviewer**:
/assign @bowei @shashidharatd 
cc @kevin-wangzefeng @euank @lhuard1A

**Release note**:

```release-note
NONE
```