Add galera system level upgrade metadata

Change-Id: I610e290986189704da54a8386d62b4c3b27c8d52
Related-prod: PROD-29630
(cherry picked from commit b8fb87471b1a8e295048ad2036409f1a457d1100)
diff --git a/galera/upgrade/init.yml b/galera/upgrade/init.yml
new file mode 100644
index 0000000..dd49ff2
--- /dev/null
+++ b/galera/upgrade/init.yml
@@ -0,0 +1,4 @@
+parameters:
+  galera:
+    upgrade:
+      enabled: ${_param:galera_upgrade_enabled}