Different strategy for empty cloud-common repo

catalog.cfg

 # kind: resf.peridot.v1.CatalogSync
-# placeholder package to declare an empty repo
 package {
-  name: "peridot-placeholder"
+  name: "kernel"
   type: 2
   repository {
     name: "cloud-common"
+    # use placeholder filter to force a new repo without any artifacts
     include_filter: "peridot-placeholder.noarch"
   }
-}
-
-package {
-  name: "kernel"
-  type: 2
   repository {
     name: "cloud-kernel"
     include_filter: "kernel-debug-devel-matched.aarch64"