Build wheels for GraalPy

[msimacek]

Change Summary

GraalPy is an alternative Python interpreter written in Java. pydantic-core already works on it out of the box, thanks to PyO3 supporting GraalPy, but it needs to be built from source. I'm adding a CI task to run tests on GraalPy and a CI task to build a wheel for GraalPy on Linux x86_64 (Other platforms should work too, but maturin currently doesn't support cross-compilation to GraalPy without having it installed. I'll work on that on maturin's side).

I tested the full build on my fork: https://github.com/msimacek/pydantic-core/actions/runs/16669541765/job/47182503777?pr=1

CC @timfel

Checklist

• Unit tests for the changes exist
• Documentation reflects the changes where applicable
  • I added a trove classifier. Let me know if there are other places
• Pydantic tests pass with this pydantic-core (except for expected changes)
  • I didn't make any code changes outside of pydantic-core tests, so I assume they still pass on CPython. As for passing on GraalPy, there were 12 failures out of 6478 (some of those are refcounting dependent and should be skipped). I'll look into those
• My PR is ready to review

Selected Reviewer: @sydney-runkle

[msimacek]

please review

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

[codspeed-hq]

CodSpeed Performance Report

Merging #1771 will not alter performance

_{Comparing msimacek:msimacek/graalpy (b57d68e) with main (1ea1fef)}

Summary

✅ 159 untouched benchmarks

[Viicos]

Thanks, I'll let @davidhewitt have a quick look as well

[davidhewitt]

Looks like the build ran clean here too, thanks!