Use Azahar emulator and upgrade context

[Meziu]

The download link of PabloMK7's Citra fork isn't working any longer, as they have decided to remove old archives and merge the work into a new emulator called Azahar.

Furthermore, our run-tests container installed packages based on ubuntu:mantic (which is EOL and lacks more or less all download repositories).

This PR aims to use Azahar and ubunut:noble, other than updating the context as seen fit.

[Meziu]

The new emulator seems to hang during the docker build (when running it for the first time), as .3dsx executables run from CLI simply return to the main emulator's menu UI when they close. I can't seem to understand whether this is an intended change from the Citra fork or an issue in my configuration...

[Meziu]

Also, in newer versions of Azahar the default AppImage uses a Qt based binary (rather than SDL2). I've had no problem getting it to run in the container, but it seems like the qt-config.ini gets reverted to default values if injected like we currently do (for the sdl2-config.ini).

[Meziu]

Also, in newer versions of Azahar the default AppImage uses a Qt based binary (rather than SDL2). I've had no problem getting it to run in the container, but it seems like the qt-config.ini gets reverted to default values if injected like we currently do (for the sdl2-config.ini).

Also, I hoped the lowest stable version would be as close as PabloMK7 original fork as possible.