use appimagetool with non-glibc linux support

[Drsheppard01]

use appimagetool with non-glibc linux support

[pchote]

From https://github.com/AppImage/appimagetool:

Unlike previous versions of this tool provided in the AppImageKit repository, this version downloads the latest AppImage runtime (which will become part of the AppImage) from https://github.com/AppImage/type2-runtime/releases.

and from https://github.com/AppImage/type2-runtime:

This repository builds a statically linked runtime for type-2 AppImages in a Alpine Linux chroot with musl libc.

Since the runtime is linked statically, libfuse2 is no longer required on the target system.

This is an important fix that allows our AppImages to finally again run by default (without requiring the user to know to install libfuse2 first) on modern distros. I have confirmed locally that this is indeed the case on a fresh x86_64 Ubuntu 24.04.

[pchote]

Can you please also remove this now redundant line from the Linux packaging?
https://github.com/OpenRA/OpenRA/blob/bleed/.github/workflows/packaging.yml#L56

[Drsheppard01]

Thanks Paul for quickly reply! I remove this line from packaging.yml

[pchote]

https://github.com/OpenRA/OpenRA/wiki/Changelog-(bleed)/_compare/6ba918dc1f5d5adcffbc4d3267380e2001e727b2