✨ Use apimachinery sets instead of maps

[itroyano]

Description

Fixes #881

Reviewer Checklist

• API Go Documentation
• Tests: Unit Tests (and E2E Tests, if appropriate)
• Comprehensive Commit Messages
• Links to related GitHub Issue(s)

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.61%. Comparing base (8041cc4) to head (2e2e85e).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #933      +/-   ##
==========================================
+ Coverage   79.15%   79.61%   +0.46%     
==========================================
  Files          15       15              
  Lines        1084     1084              
==========================================
+ Hits          858      863       +5     
+ Misses        157      154       -3     
+ Partials       69       67       -2     

Flag	Coverage Δ
e2e	57.65% <100.00%> (+0.46%)	⬆️
unit	54.70% <0.00%> (ø)

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[tmshort]

/lgtm