Since we moved to a Docker-in-Docker setup, CI jobs sometimes fail due
to the Docker VM dying with 'context cancelled' errors. This is currently
not recognized as a spurious failure, which leads to the job not being
automatically restarted. This patch fixes that.
This commit only adds a test job with the new logic since this workflow
triggers on workflow_run, which means that the changes need to be on
`main` before they can be tested. Once this is tested to work properly,
I'll make it the default definition for the workflow.
842d563151