ceph-volume: use udev data instead of LVM subprocess in get_devices()

ceph-volume: use udev data instead of LVM subprocess in get_devices()

Replace the  check using `lvm.get_device_lvs(diskname)`, which
spawned a `pvs` subprocess, with a direct check on `/run/udev/data`
via `UdevData(diskname).is_lvm`.

This avoids spawning subprocesses while scanning devices. It improves
performance on systems with many disks, and keeps the device filtering
logic intact.

Fixes: https://tracker.ceph.com/issues/73334
Signed-off-by: Guillaume Abrioux <gabrioux@ibm.com>