fix: use env vars for adapter image in cl-maestro values.yaml

Replace hardcoded `ci/hyperfleet-adapter:latest` with `${ADAPTER_IMAGE_REPO}:${ADAPTER_IMAGE_TAG}`
to match the pattern used by other adapter configs. Keep broker `CHANGE_ME` placeholders as maestro
transport requires specific configuration.

Author: rafabene

testdata/adapter-configs/cl-maestro/values.yaml

@@ -19,10 +19,10 @@ broker:
     dead_letter_topic: CHANGE_ME
 
 image:
-  registry: CHANGE_ME
-  repository: ci/hyperfleet-adapter
+  registry: ${IMAGE_REGISTRY}
+  repository: ${ADAPTER_IMAGE_REPO}
   pullPolicy: Always
-  tag: latest
+  tag: ${ADAPTER_IMAGE_TAG}
 
 rbac:
    resources: