When upgrading to the next major FCV, the shards will become authoritative. In order to be so, they need to have persisted the authoritative database metadata in the replicated collection `config.shard.databases` and the DSS filled.

This ticket aims to introduce the first piece of this transition, by introducing a DDL that clones the global catalog to the shard-local catalog and cache (DSS) for a specific database. This DDL will be run in the primary shard and will serialize by other DDLs by taking the DDL lock.