Geo: Add Dependency Proxy to Geo data types support table

I just noticed that https://gitlab.com/gitlab-org/gitlab/-/blob/master/ee/app/models/dependency_proxy/blob.rb#L10 uses a CarrierWave Uploader, so we could replicate it as a Blob, but it isn't listed in the data types table https://docs.gitlab.com/ee/administration/geo/replication/datatypes.html#limitations-on-replicationverification.

Questions

Since it's a "cache", should it be replicated at all?
Since it's a "cache", are there unusual edge cases to worry about?

Proposal

Add an entry to https://docs.gitlab.com/ee/administration/geo/replication/datatypes.html#limitations-on-replicationverification
- We can say "We have no plans to replicate this"
- Or we can open an issue to replicate it and link to it