[neutron-ovn] Add nova-metadata secret as optional

OVN Agent also supports metadata extension, but
without nova-metadata config it fails.
Added nova-metadata-neutron-config secret to
the neutron-ovn dataplane service as optional.

Resolves: #OSPRH-25996
Signed-off-by: Yatin Karel <ykarel@redhat.com>

Author: karelyatin

config/services/dataplane_v1beta1_openstackdataplaneservice_neutron_ovn.yaml

@@ -7,6 +7,9 @@ spec:
   dataSources:
     - secretRef:
         name: neutron-ovn-agent-neutron-config
+    - secretRef:
+        name: nova-metadata-neutron-config
+        optional: true
     - configMapRef:
         name: neutron-ovn-extra-config
         optional: true