[stable/2023.2] chore: add upgrade job (#1521)

This is an automated cherry-pick of #1384
/assign ricolin
diff --git a/zuul.d/project.yaml b/zuul.d/project.yaml
index d83fbfc..74dd167 100644
--- a/zuul.d/project.yaml
+++ b/zuul.d/project.yaml
@@ -151,3 +151,9 @@
     release:
       jobs:
         - atmosphere-publish-collection
+    periodic:
+      jobs:
+        - atmosphere-molecule-aio-upgrade-2023.2-openvswitch:
+            dependencies: *molecule_check_dependencies
+        - atmosphere-molecule-aio-upgrade-2023.2-ovn:
+            dependencies: *molecule_check_dependencies