Before SERVER-109078, there was a clang-tidy rule ensuring that no usage of CollectionShardingRuntime appeared outside mongo/db/s. During that work, it was decided to remove the check, with the intention of reintroducing it in a new ticket.

The idea is to pursue one of the following two options:

• Reintroduce the clang-tidy rule for CollectionShardingRuntime, updating it with the new paths (mongo/db/local_catalog, mongo/db/global_catalog, etc).
• Use the modularization work to mark the sharding runtime implementations (DatabaseShardingRuntime and CollectionShardingRuntime) as private, and explicitly declare which modules are permitted to use them.