[Feature Request] Switch to the static AppImage runtime.

[Samueru-sama]

Context:

FreeTubeApp/FreeTube#5714 (comment)
FreeTubeApp/FreeTube#5747

libfuse2 is EOL and distros no longer ship it by default, the appimage folks have a static runtime that fixes this issue, but it lives in this repo: https://github.com/AppImage/type2-runtime

Said runtime is already used by default in appimagetool and go-appimage.

Using the static runtime also allows to create appimages that work on musl distros, since the old runtime links against libc as well.