udev: add devicemapper to partuuid-workaround

udev: add devicemapper to partuuid-workaround

The dm-* devices are not excluded and will have by-partuuid symlinks
etc. This will include devices managed by multipath as well as
others. Since this only is used on partitions:

  # ignore partitions that span the entire disk
  TEST=="whole_disk", GOTO="persistent_storage_end_two"

It may create symlinks for dm-* devices that are unrelated to Ceph and
we assume this is going to be ok.

Signed-off-by: Loic Dachary <ldachary@redhat.com>