chore: Changed the process to expand yaml so that maxUnavailable, etc. can be used.

[kahirokunn]

What this PR does / why we need it:

Which issue(s) this PR fixes (optional, using fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when the PR gets merged):
Fixes #

Special notes for your reviewer:

[sozercan]

@kahirokunn thanks for the PR! Gatekeeper helm chart is autogenerated and these changes will be clobbered in the next release. Please refer to Contributing to Helm Chart for modifying the Helm chart.

[kahirokunn]

@sozercan thx. done.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 54.48%. Comparing base (0bac5b0) to head (a51aff0).
Report is 12 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3199      +/-   ##
==========================================
- Coverage   54.49%   54.48%   -0.02%     
==========================================
  Files         134      134              
  Lines       12329    12329              
==========================================
- Hits         6719     6717       -2     
- Misses       5117     5118       +1     
- Partials      493      494       +1     

Flag	Coverage Δ
unittests	54.48% <ø> (-0.02%)	⬇️

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[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 14 days if no further activity occurs. Thank you for your contributions.

[kahirokunn]

@sozercan Hello 👀

[JaydipGabani]

@kahirokunn can you instead changing vairable minAvailable, introduce a new variable maxUnavailable and respective field in PDB? that way by not chaning original variable we are not breaking users(that are using maxAvailable variable).