This moves some more of our CI jobs over to xtask and gh-workflow. This
primarily originated from the current GitHub actions outage to move
these actions over to Namespace runners. However, while I was at it I
decided to move these over to gh_workflow, as we benefit from sharing
more stuff across these files and less hacking around in YAML-files
directly.
Release Notes:
- N/A
Finn Evers
ee41463038