Test platforms not provided by GH actions via emulation

[mara004]

Want to use https://github.com/uraimo/run-on-arch-action or similar to test our linux wheels other than x86_64 glibc.
Testing windows x86, arm64 and android arm64 in the future would also be fancy, but the above action is only for linux.

[mara004]

Also note https://github.com/jirutka/setup-alpine and maybe https://cirrus-ci.org/

[mara004]

GH actually provides free linux arm64 runners now: https://github.com/orgs/community/discussions/148648