Update python version to 3.12.3

[benoit-cty]

This PR will close #1287

OpenFisca-core is working with Python 3.12 since the version 43, but allowed minimal Numpy version, 1.24, do not work with Python 3.12.

So this PR change matrix test to only test Numpy version 1.26.4 with Python 3.12, and 1.24.2 + 1.26.4 for Python 3.9.13.

[benjello]

When/How do you think this can be solved @benoit-cty ? Seems to be a problem with GCC version.

[benoit-cty]

EDIT : cache problem fixed, it was a missing activate_command parameter. But even after fixing it there was an error only on Python 3.13 for missing pytest.

I try to add Python 3.13 support but there is a problem with the cache:

Cache not found for input keys: pip-build-ubuntu-22.04-np1.26.4-py3.13.3-99de4728a41d1a653d50a01c32a197e60559a3cc7aa62537e00d48fad8142129-5fba06695a6bad9edd8f07d69d20b1f196402b35

Note:
The GitHub Actions cache for pip-build is not being created or restored for Python 3.13.3 (pip-build-ubuntu-22.04-np1.26.4-py3.13.3-...).
This works for Python 3.9.13 and 3.12.3, but for 3.13.3, the workflow shows a "Path Validation Error"—the files or directories expected for caching do not exist at the time the cache step runs.
The pip-deps cache is present for 3.13.3, so the issue is specific to the build cache.
This is likely due to a difference in the build or install process for Python 3.13.3, possibly related to dependency or compatibility issues.

Also, there is a GCC error in Windows.