fix: pg_shadow issue

Author: soedirgo

Diff for: ansible/files/admin_api_scripts/pg_upgrade_scripts/common.sh

@@ -515,6 +515,9 @@ $$;
 
 alter database postgres connection limit -1;
 
+-- #incident-2024-09-12-project-upgrades-are-temporarily-disabled
+grant pg_read_all_data, pg_signal_backend to postgres;
+
 set session authorization supabase_admin;
 drop role supabase_tmp;
 commit;