Add various Arch Linux Cloud/VM images to mirrors
The arch-boxes project currently builds three different Cloud/VM images (Cloudimg, Libvirt and Virtualbox). However, these are currently only available for download as part of the GitLab Pipeline artifact shown here, which is extremely volatile.
In order for internal and external projects to be able to depend on stable versions and URLs, these images should be added to the list of files served by the various Arch Linux mirrors. This would also provide a simple fix to the issue described in arch-boxes#125 (closed).