Switch uni-delta job to use S3 API from Ceph

Glance/RBD is already covered by uni-gamma, so uni-delta jobs could be changed to
test glance/S3 instead, using the S3 API provided by ceph.

- Updated uni04delta job architecture accordingly.

https://issues.redhat.com/browse/OSPRH-11411

Author: Maxim Sava

examples/dt/uni04delta/control-plane/service-values.yaml

@@ -70,20 +70,18 @@ data:
   glance:
     customServiceConfig: |
       [DEFAULT]
-      debug = True
-      enabled_backends = default_backend:rbd
-
+      debug=True
+      enabled_backends = default_backend:s3
       [glance_store]
       default_backend = default_backend
-
       [default_backend]
-      rbd_store_ceph_conf = /etc/ceph/ceph.conf
-      store_description = "RBD backend"
-      rbd_store_pool = images
-      rbd_store_user = openstack
+      s3_store_create_bucket_on_put = True
+      s3_store_bucket_url_format = "path"
     glanceAPIs:
       default:
         replicas: 3
+        customServiceConfigSecrets:
+          - s3glance
 
   manila:
     enabled: true

examples/dt/uni04delta/kustomization.yaml

@@ -9,3 +9,17 @@ resources:
   - control-plane/networking/nncp/values.yaml
   - control-plane/service-values.yaml
   - values.yaml
+
+replacements:
+  # Glance
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.glance.glanceAPIs.default.customServiceConfigSecrets
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.glance.template.glanceAPIs.default.customServiceConfigSecrets
+        options:
+          create: true