mgr/cephadm: call prepare_create before redeploy

mgr/cephadm: call prepare_create before redeploy

some services (notably iscsi and ha-rgw currently) rely
on actions in prepare_create to setup their configuration
even when being redeployed. This change makes sure prepare_create
is called before redeploys and reconfigurations the same way it is
done during initial deployment to avoid disrepencies. OSDs are
skipped as they do not have a normal prepare_create

Fixes: https://tracker.ceph.com/issues/48373
Signed-off-by: Adam King <adking@redhat.com>