Switch to GitLab private runners to deploy Pages
Since the archives site is 12G, we need at least that much of free disk space. The GitLab private runners for the gitlab-org group have 50G of disk space.
That said, even with bigger disks, the private runners and part of the shared-gitlab-org ones are re-using the VMs for several jobs. Each job clones sources, downloads cache, creates/downloads artifacts - in other words every next job executed on a VM, reduces the available disk space a little. So if our job would be one of the last ones executed on such VM (and scheduling here happens totally randomly), it could have way less space than 50GB.
In any case, we should test this out.