Bump PYTHON_COMPAT to py3.11

[NexAdn]

Python 3.11 is becoming the default Python implementation in June 2023 (gentoo-dev). Thus, we should test all the packages requiring Python with Python 3.11 and bump their versions afterwards. Since this process requires testing loads of packages, any help is highly appreciated!

I'll compile a list with all packages and post it here.

Packages in need of py3.11 bumps

• https://github.com/gentoo-audio/audio-overlay/issues/531
• https://github.com/gentoo-audio/audio-overlay/issues/532
• https://github.com/gentoo-audio/audio-overlay/issues/533
• https://github.com/gentoo-audio/audio-overlay/issues/534
• https://github.com/gentoo-audio/audio-overlay/issues/535
• https://github.com/gentoo-audio/audio-overlay/issues/536
• https://github.com/gentoo-audio/audio-overlay/issues/537

[NexAdn]

The package list should now be complete. If anyone is interested in helping out, please write a comment to the respective issue or assign yourself if you have the permission to do so.