Add dt-sharded deployment topology with per-service galera, rabbitmq, and memcached

New deployment topology for testing per-service database, message bus,
and cache sharding. Each OpenStack service gets a dedicated galera
cluster, a dedicated rabbitmq cluster, and a dedicated memcached
instance, all with replicas:1.

Galera databases: openstack-barbican, openstack-cinder,
openstack-designate, openstack-glance, openstack-horizon,
openstack-keystone, openstack-neutron, openstack-octavia,
openstack-nova, openstack-placement.

Per-service rabbitmq clusters: rabbitmq-barbican, rabbitmq-cinder,
rabbitmq-designate, rabbitmq-glance, rabbitmq-keystone,
rabbitmq-neutron, rabbitmq-octavia. Nova cells use the standard rabbitmq
(cell0/notifications) and rabbitmq-cell1 (cell1).

Per-service memcached instances: memcached-keystone, memcached-glance,
memcached-cinder, memcached-neutron, memcached-horizon, memcached-nova.
Services without memcachedInstance support (barbican, designate, octavia,
placement) are excluded.

Enabled services: barbican, cinder, designate, glance, horizon,
keystone, neutron, nova, octavia.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: lmiccini

automation/net-env/dt-sharded.yaml

@@ -0,0 +1,57 @@
+---
+vas:
+  dt-sharded:
+    stages:
+      - name: nncp-configuration
+        path: examples/dt/dt-sharded/control-plane/networking/nncp
+        wait_conditions:
+          - >-
+            oc -n openstack wait nncp
+            -l osp/nncm-config-type=standard
+            --for jsonpath='{.status.conditions[0].reason}'=SuccessfullyConfigured
+            --timeout=5m
+        values:
+          - name: network-values
+            src_file: values.yaml
+        build_output: nncp.yaml
+
+      - name: network-configuration
+        path: examples/dt/dt-sharded/control-plane/networking
+        wait_conditions:
+          - >-
+            oc -n metallb-system wait pod
+            -l app=metallb -l component=speaker
+            --for condition=Ready
+            --timeout=5m
+        values:
+          - name: network-values
+            src_file: nncp/values.yaml
+        build_output: network.yaml
+
+      - name: control-plane
+        path: examples/dt/dt-sharded/control-plane
+        wait_conditions:
+          - >-
+            oc -n openstack wait openstackcontrolplane
+            controlplane
+            --for condition=Ready
+            --timeout=60m
+        values:
+          - name: network-values
+            src_file: networking/nncp/values.yaml
+          - name: service-values
+            src_file: service-values.yaml
+        build_output: control-plane.yaml
+
+      - name: edpm-deployment
+        path: examples/dt/dt-sharded
+        wait_conditions:
+          - >-
+            oc -n openstack wait openstackdataplanedeployment
+            edpm-deployment
+            --for condition=Ready
+            --timeout=40m
+        values:
+          - name: edpm-nodeset-values
+            src_file: values.yaml
+        build_output: edpm.yaml

automation/vars/dt-sharded.yaml

@@ -0,0 +1,20 @@
+---
+apiVersion: kustomize.config.k8s.io/v1alpha1
+kind: Component
+
+transformers:
+  - |-
+    apiVersion: builtin
+    kind: NamespaceTransformer
+    metadata:
+      name: _ignored_
+      namespace: openstack
+    setRoleBindingSubjects: none
+    unsetOnly: true
+    fieldSpecs:
+    - path: metadata/name
+      kind: Namespace
+      create: true
+
+components:
+  - ../../../lib/dataplane