let helm emit available Kubernetes API versions, closes #6634

[wildfluss]

Tracking issue

Closes #6634

Why are the changes needed?

Improve documentation

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[Sovietaced]

@wildfluss can you sign off your commits?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 58.57%. Comparing base (6e343cd) to head (86ab978).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6635      +/-   ##
==========================================
- Coverage   59.92%   58.57%   -1.36%     
==========================================
  Files         708      929     +221     
  Lines       51365    70907   +19542     
==========================================
+ Hits        30783    41537   +10754     
- Misses      18270    26217    +7947     
- Partials     2312     3153     +841     

Flag	Coverage Δ
unittests-datacatalog	59.03% <ø> (ø)
unittests-flyteadmin	56.10% <ø> (-0.03%)	⬇️
unittests-flytecopilot	40.87% <ø> (ø)
unittests-flytectl	64.64% <ø> (ø)
unittests-flyteidl	76.12% <ø> (ø)
unittests-flyteplugins	61.10% <ø> (ø)
unittests-flytepropeller	55.06% <ø> (?)
unittests-flytestdlib	63.05% <ø> (ø)

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[Sovietaced]

@wildfluss Can you also run make helm in the project root and check in the generated code?