ci: update to GraalPy 24.2 and mention in README

[henryiii]

Description

This keeps one 24.1 build, and adds a mention to the README alongside PyPy. I thought about adding Pyodide here too, but since that's basically CPython, it seems odd to call it out here. Maybe somewhere else.

Inspired by #5584.

This now adds more info to the test printout too.

[henryiii]

Interesting,

______________________________ test_unscoped_enum ______________________________
[XPASS(strict)] TODO should get fixed on GraalPy side
____________________________ test_binary_operators _____________________________
[XPASS(strict)] TODO should get fixed on GraalPy side
________________________ test_operators_notimplemented _________________________
[XPASS(strict)] TODO should get fixed on GraalPy side

[henryiii]

@msimacek, I need the GraalPy version. That should be sys.implementation.version, but for some reason GraalPy 24.1.0 returns sys.version_info instead (3.11.7.alpha), which isn't helpful. This is supposed to be the implementation version. For example, on PyPy 7.3.11:

>>>> import sys
>>>> sys.implementation.version
sys.pypy_version_info(major=7, minor=3, micro=11, releaselevel='final', serial=0)
>>>> sys.version_info
sys.version_info(major=3, minor=9, micro=16, releaselevel='final', serial=0)

Is there a way to get the implementation version?

[msimacek]

Agreed, we should fix that. It seems we currently only have __graalpython__.get_graalvm_version(), which returns the version as a string.

[henryiii]

Currently, I'm storing GRAALPY_VERSION_NUM, but getting it from here would be a bit better, I could store it for use in env.py. I'll change that in the next commit.

Interesting, __graalpython__ had python spelled out, but usually it's graalpy elsewhere.

[rwgk]

Cool! — Just to document that I looked. Could you please tag me when it's final?

[rwgk]

Nice, thanks!

[msimacek]

Looks good to me too, thank you for working on this.

Interesting, graalpython had python spelled out, but usually it's graalpy elsewhere.

GraalPy's name used to be GraalPython. It was changed few years ago to GraalPy, mostly due to legal worries about "python" being a registered trademark, but the old name is still present in some places to preserve backwards compatibility.