[CI] [macOS] Fix CI with new GitHub runners

[AThousandShips]

New macos-latest run on an arm64 image instead of x86_64 breaking the editor workflow.

See, for example, my own fork:
https://github.com/AThousandShips/godot/actions/runs/8804685495/job/24165878085

This seems to be rolled out piecemeal so currently the main repo hasn't been affected, but I've seen other cases

Picked macos-12 as it's been what's been run on the main repo in my checking

[fire]

This will fix our problems today, but it still leaves work to handle switching between two versions of macos builders.

[akien-mga]

Thanks!

[AThousandShips]

Thank you!

[AThousandShips]

but it still leaves work to handle switching between two versions of macos builders.

Indeed, chose this approach partially because it wasn't guaranteed for the macos-latest to be the arm version, a more permanent solution would be to make the binary detect the appropriate architecture and make it image agnostic, assuming everything runs fine on the new image, will look into it as well

[bruvzg]

It should be able to do something like bin: ${{ env.RUNNER_ARCH == "X64" && "./bin/godot.macos.editor.x86_64" || "./bin/godot.macos.editor.arm64" }} (have not tested if exact syntax is correct), and detect the arch.

But the best is probably to build both x86_64 and arm64, since some x86_64 target older min. OS version and might have different build issues is new or deprecated API is introduced. At least building both should be possible on any runner arch (not sure about running tests).

[AThousandShips]

Good points, will see if I can test some stuff for that

Will actually see if I can use lipo and make an universal build, like the build scripts do, that'd be more convenient for testing anyway I think, we'll just run the universal version no need to test for arch, though the one question is how to ensure we get consistent testing on both arches, but we don't run tests on all windows arches so shouldn't be an issue necessarily