NET-5272/add docs team code owners to review helm values description

[JadhavPoonam]

Changes proposed in this PR

• Adds a CODEOWNERS file that would request a review from the docs team when helm values are changed. This review is non-blocking as we don't set the required review setting in the branch protection rules.

How I've tested this PR

It should take effect in the next PR.

### How I expect reviewers to test this PR ###

Checklist

• Tests added
• CHANGELOG entry added

[JadhavPoonam]

Please double-check the backport labels for me as I am not sure which versions of K8s we are backporting to now.

[zalimeni]

Thanks for the note on branch protections! LGTM.

Minor nit, can we add a description to the PR title as well so it's clear from preview links and the squashed merge commit what the change was?

[zalimeni]

Please double-check the backport labels for me as I am not sure which versions of K8s we are backporting to now.

You nailed it! There's also a doc here w/ more info about the backport policy: https://go.hashi.co/consul-backports

We also update labels on each major release to gray out and describe old labels as no longer active (and eventually remove them when we're well past the last patch release for that version).