[extras] add a config management workload for Meta

Start by tracking dummy-package-canary which we use to verify that DNF
is healthy

Author: michel-slm

configs/eln_extras_meta_config_mgmt.yaml

@@ -0,0 +1,10 @@
+document: feedback-pipeline-workload
+version: 1
+data:
+  name: meta-sig configuration management packages
+  description: ELN Extras packages for configuration management
+  maintainer: meta-sig
+  packages:
+    - dummy-package-canary
+  labels:
+    - eln-extras