Python 3.12 support

[benfred]

No description provided.

[karolinepauls]

I built this branch for our internal use and can confirm it works for us. A normal release build, I haven't tried static linking. I don't mind the line numbers. Thank you.

[walnutwaldo]

Built this for our internal use as well and it works

[psi29a]

Following :D

[paalka]

In case it is useful to someone looking for a profiler with 3.12 support, austin is an alternative to py-spy with similar features and low overhead :)

Austin also uses a similar approach to py-spy in order to get the state of the GIL, which I think might be one of the pieces that is missing in order to fully support python 3.12 in py-spy.

[jiangliu]

Look forward to get this work merged:)

[benfred]

This doesn't handle the GIL detection yet - but I think this is worth merging anyways.

I've created #692 to track the GIL detection issue

[tugtugtug]

This is great news and nice work! @benfred when will we have a release build that supports 3.12?

[benfred]

GIL support is handled by #713 -

@tugtugtug I've created #714 to track the new release. If you're interested in testing the current state of things, you can download the built wheels from any CI run like https://github.com/benfred/py-spy/actions/runs/11600917374#artifacts