Simplify validators

[jjngx]

Proposed changes

This PR simplifies validators.

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

[codecov]

Codecov Report

Merging #3909 (8286356) into main (4cba337) will decrease coverage by 0.13%.
The diff coverage is 94.73%.

@@            Coverage Diff             @@
##             main    #3909      +/-   ##
==========================================
- Coverage   51.91%   51.79%   -0.13%     
==========================================
  Files          59       59              
  Lines       16742    16697      -45     
==========================================
- Hits         8692     8648      -44     
+ Misses       7750     7749       -1     
  Partials      300      300              

Impacted Files	Coverage Δ
internal/k8s/validation.go	93.48% <94.73%> (-0.40%)	⬇️

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more