Fix ml2MechanismDrivers reset in uni04delta-ipv6 edpm stage

The edpm/nodeset kustomization updates OpenStackControlPlane after
ceph deployment but was missing the ml2MechanismDrivers replacement,
causing it to reset to default ['ovn'] instead of ['ovn', 'baremetal'].

Add the missing replacement to preserve ml2MechanismDrivers.

Note: While it may seem odd that edpm (dataplane) patches control-plane,
this is the established pattern for post-ceph deployment updates.

JIRA: OSPCIX-1110 (Related)
JIRA: OSPRH-14448
JIRA: OSPRH-20084
Signed-off-by: Harald Jensås <[email protected]>

Author: hjensas

dt/uni04delta-ipv6/edpm/nodeset/kustomization.yaml

@@ -139,6 +139,18 @@ replacements:
         options:
           create: true
 
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.neutron.ml2MechanismDrivers
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.neutron.template.ml2MechanismDrivers
+        options:
+          create: true
+
   - source:
       kind: ConfigMap
       name: edpm-nodeset-values