Automatically select new free arm64 runners for aarch64 publish jobs

[Cadair]

They only work in public repos, but as long as we document this we should automatically select these runners for aarch64 jobs: https://github.blog/changelog/2025-01-16-linux-arm64-hosted-runners-now-available-for-free-in-public-repositories-public-preview/

[pllim]

Oh wait I didn't see you specifically said publish jobs. What about regular CI?

[Cadair]

The publish jobs auto select based on architecture in the build name. How would we auto select for CI jobs?

[pllim]

Are you saying that it would Just Work ™ if I put runs-on: ubuntu-24.04-arm on the workflow?

[Cadair]

yes