[ci] Add capability to rerun failed action on PR using /rerun comment

[paulojmdias]

Description

This PR enables contributors to re-trigger failed jobs by using the /rerun comment in the PRs.

The same was done in the contrib side, and I think it is valuable to port it to the core side.

Documentation

Updated the CONTRIBUTING.md with this reference.

[dmathieu]

You mention that only PR authors can do this rerun (which makes sense). I'm not seeing any check that the person writing the comment is indeed the PR author though. How is that enforced?

Do you know what happens if an author sends /rerun in a PR for which the actions haven't been approved yet (first time contributors need a manual action from a triager+ to run their action)?

[codspeed-hq]

CodSpeed Performance Report

Merging #14314 will not alter performance

_{Comparing paulojmdias:ci/_rerun (696cd96) with main (4ce4e37)}

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

Summary

✅ 59 untouched
⏩ 20 skipped¹

Footnotes

1. 20 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.09%. Comparing base (4ce4e37) to head (696cd96).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #14314      +/-   ##
==========================================
- Coverage   92.11%   92.09%   -0.02%     
==========================================
  Files         668      668              
  Lines       41363    41363              
==========================================
- Hits        38100    38092       -8     
- Misses       2226     2231       +5     
- Partials     1037     1040       +3     

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[paulojmdias]

You mention that only PR authors can do this rerun (which makes sense). I'm not seeing any check that the person writing the comment is indeed the PR author though. How is that enforced?

Thanks for the review @dmathieu! Good catch, I added that filter now. I will port it to the contrib side as I agree it makes sense.

Do you know what happens if an author sends /rerun in a PR for which the actions haven't been approved yet (first time contributors need a manual action from a triager+ to run their action)?

Will do nothing, since the script is filtering by the failing ones only, as you can see in the following line