mgr/dashboard: rm nvmeof conf based on its daemon name

mgr/dashboard: rm nvmeof conf based on its daemon name

don't remove an entire entry of a service from the config if only the daemon is
removed, instead just remove the entry of that particular daemon. and
once all the entry are succesfully removed, remove the entry for service

https://tracker.ceph.com/issues/68697
Signed-off-by: Nizamudeen A <nia@redhat.com>
(cherry picked from commit 4080115739da4f7ba73a8c0b215aa6b43a34ab71)

 Conflicts:
	src/pybind/mgr/cephadm/services/nvmeof.py
 - accepted the current change in squid since gw-groups implementation
   removal looks like missing