Merge pull request kubernetes#56170 from rajansandeep/corefileupdate

Automatic merge from submit-queue (batch tested with PRs 55340, 55329, 56168, 56170, 56105). 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>.

Update the configmap manifest in CoreDNS

**What this PR does / why we need it**:
This PR updates the corefile to retain the pod requests support like in kube-dns. This helps when upgrading CoreDNS using kubeadm upgrade (kubernetes#55952).

**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**:

```release-note
NONE
```

Author: Kubernetes Submit Queue

cmd/kubeadm/app/phases/addons/dns/manifests.go

@@ -295,7 +295,9 @@ data:
         errors
         log stdout
         health
-        kubernetes {{ .DNSDomain }} {{ .ServiceCIDR }}
+        kubernetes {{ .DNSDomain }} {{ .ServiceCIDR }} {
+           pods insecure
+        }
         prometheus
         proxy . /etc/resolv.conf
         cache 30