Test with project-config graphs

This uses the job from the dependent change to import and take
screnshots of graphs from project-config.  This job will pull from the
intermediate registry, hence to add opendev-buildset-registry.

Depends-On: https://review.opendev.org/c/openstack/openstack-zuul-jobs/+/847128/
Change-Id: I175635543c1a1dfe8c29304be0ccd2a58c20aac3

.zuul.yaml

@@ -25,6 +25,8 @@
       - python-base-3.8-container-image
     provides:
       - grafyaml-container-image
+    dependencies:
+      - opendev-buildset-registry
     vars: &grafyaml_image_vars
       docker_images:
         - context: .
@@ -62,7 +64,9 @@
       release_python: python3
     check:
       jobs:
+        - opendev-buildset-registry
         - grafyaml-build-image
+        - project-config-grafana
     gate:
       jobs:
         - grafyaml-upload-image