Geo: Move LFS files to Self-Service Framework
Engineering Owner: `@ibaum`
## Background
LFS objects are currently implemented using the `file_download_dispatch_worker`, this has a number of drawbacks that are solved in our new self service framework. By migrating to the self service framework, we not only remove the need to poll for changes, but also we bring this class in line with newer replicables. That will make it easier to leverage future ssf additions and reliability.
## Work to Do
Issue/MR 1:
- [ ] Implement lfs objects as an SSF blob replicable
Issue/MR 2:
- [ ] Migrate lfs_object_registry to use `Geo::ReplicableRegistry`
- [ ] Remove lfs replication with `file_download_dispatch_worker`
Issue/MR 3:
- [ ] SSF Graphql for LFS objects
## Notes
epic