helm: Remove unnecessary admissionregistration.k8s.io/v1beta1

[johngmyers]

Issue

Description

Now that the minimum supported Kubernetes version supports admissionregistration.k8s.io/v1 there is no reason for the Helm templates to support older API versions.

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the docs directory)
• Manually tested
• Made sure the title of the PR is a good description that can go into the release notes

BONUS POINTS checklist: complete for good vibes and maybe prizes?! 🤯

• Backfilled missing tests for code in same general area 🎉
• Refactored something and made the world a better place 🌟

[codecov-commenter]

Codecov Report

Merging #2443 (791e72a) into main (46668f1) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #2443   +/-   ##
=======================================
  Coverage   53.37%   53.37%           
=======================================
  Files         140      140           
  Lines        7966     7966           
=======================================
  Hits         4252     4252           
  Misses       3397     3397           
  Partials      317      317           

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[kishorj]

Thanks for the changes.

[kishorj]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: johngmyers, kishorj

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