Add Support for Rewrite Plugin to CoreDNS/NodelocalDNS

[eifelmicha]

What type of PR is this?
/kind feature

What this PR does / why we need it:
Adds support for the usage of CoreDNS plugin rewrite: https://coredns.io/plugins/rewrite/
This allows to rewrite for example external domains to internal kubernetes service names before passing the query to upstream dns

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:
I did not found an variable for the CoreDNS Cluster IP, therefore i added the standard 10.233.0.3 hardcoded in the examples.

Does this PR introduce a user-facing change?:

Add Support for Rewrite Plugin to CoreDNS/NodelocalDNS

[k8s-ci-robot]

Hi @eifelmicha. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[yankay]

/lgtm
/ok-to-test

[cristicalin]

Thanks @eifelmicha !

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cristicalin, eifelmicha

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