chore: update to oci references

Author: xeniape

tests/templates/kuttl/ad-user-info/20-install-test-regorule.yaml

@@ -17,7 +17,7 @@ spec:
     spec:
       containers:
       - name: test-regorule
-        image: docker.stackable.tech/stackable/testing-tools:0.2.0-stackable0.0.0-dev
+        image: oci.stackable.tech/sdp/testing-tools:0.2.0-stackable0.0.0-dev
         stdin: true
         tty: true
         resources: