Support DCN network routes in NetConfig subnet definitions

Add routes field to DCN subnet definitions in netconfig_networks to enable
proper inter-site connectivity. Routes are templated from edpm_dcn1_routes
and edpm_dcn2_routes variables.

The NetConfig controller propagates these routes to IPSet status, which the
openstack-operator inventory generator reads to create {network}_host_routes
ansible variables for the EDPM network configuration template.

Changes:
- Add routes to internalapidcn1/dcn2 subnets for RabbitMQ/API connectivity
- Add routes to storagedcn1/dcn2 subnets for storage traffic
- Add routes to tenantdcn1/dcn2 subnets for tenant network traffic

This fixes the issue where DCN compute nodes couldn't connect to RabbitMQ
and other control plane services because they lacked routes to central site.

Co-Authored-By: Claude <noreply@anthropic.com>
Signed-off-by: John Fulton <fulton@redhat.com>

Author: 2 people

tests/vars.dcn_nostorage.yaml

@@ -91,12 +91,14 @@ netconfig_networks:
       cidr: 172.17.10.0/24
       name: internalapidcn1
       vlan: 30
+      routes: "{{ edpm_dcn1_routes.get('internalapidcn1', []) }}"
     - allocationRanges:
       - end: 172.17.20.250
         start: 172.17.20.100
       cidr: 172.17.20.0/24
       name: internalapidcn2
       vlan: 40
+      routes: "{{ edpm_dcn2_routes.get('internalapidcn2', []) }}"
   - dnsDomain: external.example.com
     mtu: 1500
     name: External
@@ -126,12 +128,14 @@ netconfig_networks:
       cidr: 172.18.10.0/24
       name: storagedcn1
       vlan: 31
+      routes: "{{ edpm_dcn1_routes.get('storagedcn1', []) }}"
     - allocationRanges:
       - end: 172.18.20.250
         start: 172.18.20.100
       cidr: 172.18.20.0/24
       name: storagedcn2
       vlan: 41
+      routes: "{{ edpm_dcn2_routes.get('storagedcn2', []) }}"
   - dnsDomain: storagemgmt.example.com
     mtu: 1500
     name: storagemgmt
@@ -172,10 +176,12 @@ netconfig_networks:
       cidr: 172.19.10.0/24
       name: tenantdcn1
       vlan: 32
+      routes: "{{ edpm_dcn1_routes.get('tenantdcn1', []) }}"
     - allocationRanges:
       - end: 172.19.20.250
         start: 172.19.20.100
       cidr: 172.19.20.0/24
       name: tenantdcn2
       vlan: 42
+      routes: "{{ edpm_dcn2_routes.get('tenantdcn2', []) }}"