[Testing Update] 2023-08-31 - Kernels, Firefox, Thunderbird, LLVM, Mauikit, Qemu 8.1.0

[freggel.doe]

@psifi

wait for other solutions

[Unstable Update] 2023-05-21 - Repository changes

Users of the mesa-nonfree repo need to watch out for llvm update: https://forum.manjaro.org/t/behind-the-scene-manjaro-community-mesa-nonfree-codecs/135012/20 mesa packages need a rebuild and that repo lags behind.