mgr/cephadm: pass --container-init to `cephadm deploy` if specified

mgr/cephadm: pass --container-init to `cephadm deploy` if specified

This (sort of) reverts a small part of 442904bf2da, in order to
work correctly with 82d30afc413.  The problem is that the latter
commit sets CONTAINER_INIT=False, which means we need to explicitly
pass --container-init to cephadm if we want that behaviour turned on.
There's a kink though: --container-init is only valid with cephadm's
"adopt", "bootstrap" and "deploy" commands; it's not a global option.
The cephadm mgr module doesn't invoke "adopt" or "bootstrap", only
"deploy", so we're only setting it in that specific case.

Fixes: https://tracker.ceph.com/issues/52064
Signed-off-by: Tim Serong <tserong@suse.com>