Skip e2e tests when only non-e2e workflow files change

[khrm]

Adds change detection logic to categorize whether modified files require e2e testing. Non-e2e workflow files (go-coverage, codeql, dependabot-regen, etc.), codecov config, and docs skip e2e.

Changes

Submitter Checklist

As the author of this PR, please check off the items in this checklist:

• Has Docs if any changes are user facing, including updates to minimum requirements e.g. Kubernetes version bumps
• Has Tests included if any functionality added or changed
• Follows the commit message standard
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• Release notes contains the string "action required" if the change requires additional action from users switching to the new release

Release Notes

NONE

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[khrm]

/kind misc

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 32.14%. Comparing base (72d276a) to head (8532a89).
⚠️ Report is 21 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2102      +/-   ##
==========================================
+ Coverage   31.95%   32.14%   +0.19%     
==========================================
  Files         260      260              
  Lines       11967    11967              
==========================================
+ Hits         3824     3847      +23     
+ Misses       7824     7797      -27     
- Partials      319      323       +4     

Flag	Coverage Δ
unit-tests	32.14% <ø> (+0.19%)	⬆️

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[khrm]

@savitaashture We can merge this also.