Merge PR #38048 into nautilus

* refs/pull/38048/head:
	ceph-volume: fix lvm help test
	ceph-volume: remove mention of dmcache from docs and help text

Reviewed-by: Jan Fajerski <jfajerski@suse.com>

diff --cc src/ceph-volume/ceph_volume/tests/devices/lvm/test_prepare.py
Simple merge