Huge push for Python 3.12 & LTO rebuilds

[kth5]

[testing] has or is about to receive a huge batch of updates primarily concerning Python 3.12 and LTO rebuilds.

This may or may not cause problems as this is still an ongoing effort.

If you are unsure whether your applications are compatible or you aren't ready to tinker with your systems just yet, please hold off [testing] a while longer.

I'll post status updates here.

[kth5]

Python 3.12 and most if not everything else is being updated appropriately and just went to to [base].

Since a few things may not work properly with Python 3.12, I added a python311 package (thanks to AUR for the template yet again!) so you can fall back as needed.

Please ensure you update your virtualenvs etc as needed.