update(ci): restore tests on debian trixie and fedora

[git-developer]

I noticed that the build of Debian Trixie and tests on Trixie and Fedora have been disabled due to

ARM64 builds fail for Trixie and F41

This seems not to occur anymore.

This PR adjusts:

• Reinstantiate the build of Debian Trixie
• Reinstantiate the tests on Debian Trixie, Fedora 41 and Fedora 42
• Remove tests on Fedora 40 (EOL)
• Remove tests on Arch (due to segmentation fault for unknown reason)
• Prepare arm64 tests to be run on a native arm64 runner (no qemu involved); tests are still disabled because of APPRUN_ERROR: No such file or directory AppImageCrafters/appimage-builder#272 and may be enabled as soon as a fixed release of appimage-builder is available.
• Update GitHub actions to the latest version

FYI: Native arm64 runners are now available for public projects, offering a significant performance boost. Unfortunately the AppImage build cannot use them because the build-appimage action uses a docker image that is amd64 only.

A GitHub Action run is available as demonstration.

[C0rn3j]

Thanks for the PR!