custom runners on github

[andreineculau]

more of a note, than a task. if we ever need custom runners, we could make use of https://github.com/nikovirtala/cdk-github-actions-runner and host those runners on aws fargate , pay on-demand

[andreineculau]

above all, we need arm64 hosts for docker multi-arch builds.
that we already have if needed
furthermore macos ventura should make it easier to run intel containers on arm64 architecture, so the prio of this ticket decreases.
we can probably wait it out for github actions to make arm64 runners available. azure has arm64 machines in preview https://azure.microsoft.com/en-us/blog/now-in-preview-azure-virtual-machines-with-ampere-altra-armbased-processors/