Drop Python 3.8 & Add Support for Python 3.12

[irtazaakram]

Description:

Follow and complete all of the following steps for the issue to be marked as done.

• Update the tox.ini, setup.py, setup.cfg, or pyproject.toml to remove Python 3.8 and add support for Python 3.12.
• Ensure GitHub Actions workflows, including the CI matrix, are updated to reflect the supported Python versions (3.11, and 3.12).
• Adjust any testing or build configurations to ensure compatibility with Python 3.12.
• Remove references to Python versions earlier than 3.11 from all relevant configuration files.
• Run all tests and verify they pass in the CI with the updated versions.
• Add a CHANGELOG entry: “Dropped support for Python 3.8 and added support for Python 3.12.”
• Bump the package version and release a new version on GitHub & PyPI (where applicable).

[MaxFrank13]

Hello @irtazaakram are there any plans from AXIM side to do this work? If not, Aperture can prioritize it as the maintainers of this repo

[irtazaakram]

Hi @MaxFrank13, Axim won't be taking this on, as we only want to track the work. The maintainers will handle it themselves.

[deborahgu]

thank you!

[UsamaSadiq]

openedx/credentials has been upgraded to Python 3.11 so this issue can be closed now.