ROX-32966: Add on-comment trigger for collector-on-push

[kurlov]

Description

Add a konflux retest alias for consistency with stackrox: stackrox/stackrox#18917

Both /konflux-retest collector-on-push and /retest collector-on-push can be used to rebuild failed job

Checklist

• Investigated and inspected CI test results
• Updated documentation accordingly

Automated testing

• Added unit tests
• Added integration tests
• Added regression tests

If any of these don't apply, please comment below.

Testing Performed

TODO(replace-me)
N/A

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 27.38%. Comparing base (abb69dc) to head (b68e92f).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2948   +/-   ##
=======================================
  Coverage   27.38%   27.38%           
=======================================
  Files          95       95           
  Lines        5427     5427           
  Branches     2548     2548           
=======================================
  Hits         1486     1486           
  Misses       3214     3214           
  Partials      727      727           

Flag	Coverage Δ
collector-unit-tests	27.38% <ø> (ø)

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[msugakov]

I disagree 👇

[msugakov]

/konflux-retest collector-on-push