Improve runtime batch reloads

[ciarams87]

Proposed changes

Improve runtime batch updates by only updating all configs when the ConfigMap was one of the updated resources in the batch event. Additionally, ensure endpoint updates for services not referenced in any of the watched resources do not trigger an update.

Testing:

• Tested locally using services both referenced and not referenced by watched resources.
• Ran the batch reload test suite and confirmed they pass

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 #4371 (a218177) into main (3b91d97) will decrease coverage by 0.11%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #4371      +/-   ##
==========================================
- Coverage   52.19%   52.08%   -0.11%     
==========================================
  Files          59       59              
  Lines       16929    16956      +27     
==========================================
- Hits         8836     8832       -4     
- Misses       7796     7825      +29     
- Partials      297      299       +2     

Files Changed	Coverage Δ
internal/configs/configurator.go	37.68% <0.00%> (-0.27%)	⬇️
internal/k8s/controller.go	11.93% <0.00%> (-0.08%)	⬇️

... and 1 file with indirect coverage changes

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