gitlab-ci: Use virtme-ng for running our tests
The were a few issues with this:
- udevd is needed in docker runner executor for the virtme-ng to be able to use virtio-serial
- the script needs to have its poweroff removed otherwise nothing runs after and thus failing the job although tests succeeded
- revert the kernel to 6.3 to avoid drm-writeback timing out
Edited by Marius Vlad