switch2containers: do not stop ceph.target in osd play

`ceph.target` should be disabled only. Otherwise, in collocation
scenario you stop other collocated services in the OSD play which isn't
what we want to do. Each daemon has its corresponding play for managing
the transition to container.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1901865



Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>