mgr/cephadm: add ability to zap OSDs' devices while draining host

mgr/cephadm: add ability to zap OSDs' devices while draining host

Currently, when cephadm drains a host, it will remove all OSDs on
the host, but provides no option to zap the OSD's devices afterwards.
Given users are draining the host likely to remove it from the cluster,
it makes sense some users would want to clean up the devices on the
host that were being used for OSDs. Cephadm already supports zapping
devices outside of host draining, so it makes shouldn't take much to
add that functionality to the host drain as well.

Fixes: https://tracker.ceph.com/issues/61593
Signed-off-by: Adam King <adking@redhat.com>