Validate JWT key, realm and login url for ingress resources annotations

[haywoodsh]

Proposed changes

Validate JWT key, realm and login url for ingress resources annotations.

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-commenter]

Codecov Report

Merging #2754 (2874623) into main (398e660) will increase coverage by 0.10%.
The diff coverage is 100.00%.

❗ Current head 2874623 differs from pull request most recent head c94f662. Consider uploading reports for the commit c94f662 to get more accurate results

@@            Coverage Diff             @@
##             main    #2754      +/-   ##
==========================================
+ Coverage   53.52%   53.63%   +0.10%     
==========================================
  Files          52       52              
  Lines       14804    14838      +34     
==========================================
+ Hits         7924     7958      +34     
  Misses       6617     6617              
  Partials      263      263              

Impacted Files	Coverage Δ
internal/k8s/validation.go	99.17% <100.00%> (+0.08%)	⬆️

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[jjngx]

👍🏻