Build and test iOS on GitHub M1 runners (#110406)
They are here https://github.blog/2023-10-02-introducing-the-new-apple-silicon-powered-m1-macos-larger-runner-for-github-actions
I have been able to run iOS simulator tests on my M1 laptop without issues. Some numbers:
* iOS build takes ~1h with x86 runners
* The new M1 runners take ~20m https://github.com/pytorch/pytorch/actions/runs/6386171957
Pull Request resolved: https://github.com/pytorch/pytorch/pull/110406
Approved by: https://github.com/malfet, https://github.com/seemethere
