Add build for linux aarch64 (arm64) - POC

[Firefishy]

The adds building for linux aarch64 (arm64).

*** DANGER DANGER ***
Because the builds use qemu for emulation are extremely slow and likely to timeout before completion.

The likely solution is to add ccache using GitHub Actions Cache or use private arm based github action runner or waiting until public arm based GitHub runners are available.

[Firefishy]

This unfortunately is NOT practical at the moment because the ARM builds are likely to timeout due to the extremely slow ARM emulation.

[Firefishy]

Link: #69

[Firefishy]

I ran an experiment using a Self Hosted ARM64 runner on a Raspberry PI 5. The builds take ~45 minutes per python version. It required minor reworks to get it to work.

[EwoutH]

GitHub now has macOS Arm runners available:

• GitHub Actions: Introducing the new M1 macOS runner available to open source!

Today, GitHub is excited to announce the launch of a new M1 macOS runner! This runner is available for all plans, free in public repositories, and eligible to consume included free plan minutes in private repositories. The new runner executes Actions workflows with a 3 vCPU, 7 GB RAM, and 14 GB of storage VM, which provides the latest Mac hardware Actions has to offer. The new runner operates exclusively on macOS 14 and to use it, simply update the runs-on key in your YAML workflow file to macos-14.

However, cibuildhweel is already working on support, so I think with #118 we could already include that in the workflow once we upgrade to macos-14 runners.

[Firefishy]

Unless I am mistaken new open source available macos-14 runners do not support Docker.