This makes it so that instead of the files you download being `sdl2-ryujinx-headless` they are now `nogui-ryujinx`in the release (and canary) artifacts
* Add macOS Headless release workflow * Add MACH-O check before applying signature * Rename script for consistency * Remove redundant compiler flag * Fix release.yml arguments + names * Update headless.sh to include changes of pr #5398