Once the upgrade/downgrade process for authoritative database metadata shards is complete, we will have a comprehensive set of tests that trigger the full procedure, including cloning from the global catalog to the shard-local catalog.

However, to work incrementally, we currently have the clone_authoritative_db_metadata.js test, which internally verifies how this DDL should behave. Since we will have broader test coverage for this functionality, we may want to remove this test.