mgr/dashboard: Recommended first-time setup" banner should disappear once the NVMEoF configs are created and available

Fixes: https://tracker.ceph.com/issues/78888
Signed-off-by: pujaoshahu <pshahu@redhat.com>

 Conflicts:
	src/pybind/mgr/dashboard/frontend/src/app/ceph/block/nvmeof-tabs/nvmeof-tabs.component.html
- Kept heading="Gateway groups"

Signed-off-by: pujashahu <pshahu@redhat.com>