Bump CoreDNS to GA in kubeadm

[rajansandeep]

What this PR does / why we need it:
Graduates CoreDNS to GA.

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

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[timothysc]

/cc @luxas

[timothysc]

default - true please .

[detiber]

I also cherry-picked this into my PR for defaulting the CoreDNS feature flag to true: #63509

[fturib]

@timothysc @detiber @luxas : after talk with @thockin, @bowei - it was agreed that CoreDNS will go GA this version 1.11 of k8s, but will be the default DNS service only after some adoption by users - which means at earlieast v1.12

So, the KEP was changed to include only the GA part : kubernetes/community#1956

Another KEP has to ne opened for the "Default" part.

and the initial feature description was also changes, and now there are 2 features proposed opened:

• one for GA : Enable CoreDNS as a DNS plugin for Kubernetes enhancements#427
• one for Default : Switch default DNS plugin to CoreDNS enhancements#566

[neolit123]

can be closed given it was cherry picked here #63509.

[luxas]

@fturib We're enabling it by default in v1.11 anyway. That way we'll also be kind of a guinea pig (although that really shouldn't be the case for GA) and maybe catch potential issues before v1.12. It's probably better than the current kube-dns anyway.

[luxas]

Closing in favor of #63509. Thanks!