mgr/cephadm: nfs migration: avoid port conflicts

mgr/cephadm: nfs migration: avoid port conflicts

The nfs upgrade renames the nfs spec from `nfs.ganesha-{service_id}`
to `nfs.{service_id}`. Previously we used the orphan-daemon check
to remove the old `nfs.ganesha-{service_id}` daemons. This does not work
as sometimes serve() tries to deploy the new daemons before cleaning up the
old daemons. This results in a port conflict breaking the upgrade.

Fixes: https://tracker.ceph.com/issues/53424
Signed-off-by: Sebastian Wagner <sewagner@redhat.com>