Follow-up to 8dd6589e66d03e45e1d510601da9531a30842cff: PATH is not a
valid lsblk tag, we need to use KNAME with -p flag.
Also add a vmedia job to avoid breakages in the future. It's added
non-voting because we have a deadlock with this change:
https://review.opendev.org/c/openstack/ironic/+/783722
Change-Id: Ifffeac9c1c4d394526d655eaa14c9fe7bd3a1e5e