Use GitLab CI to perform actual wipe tests with loop devices and device-mapper
It turns out you can configure loop devices and devicemapper on GitLab CI. See https://gitlab.com/derobert/aban/-/jobs/418301578 for a log of a quick test.
This could be used not only to make devices to wipe (with loop), but also to make devices with various failure modes (write errors, read errors, lost writes, etc.)