Geo: Self Service Framework - Verify LFS Objects
## Background
With https://gitlab.com/groups/gitlab-org/-/epics/1817 complete, we need to add verification for the other blob types! This issue is for adding it to LFS objects.
## Definition of Done
- [x] LFS objects blobs are verified
- [ ] Verification for LFS objects is enabled and tested on staging
- [x] An issue is filed to coordinate the feature flag release
## Procedure
Loosely From @mkozono on https://gitlab.com/groups/gitlab-org/-/epics/5285#note_495424992
1. Add primary-side verification fields to LFS object model table
2. Add secondary-side verification fields to LFS object registry table
3. Return the status of `Feature.enabled?(:geo_lfs_object_verification)`, from self.verification_feature_flag_enabled? for LFS object replicator
4. Add to LFS object registry classes:
```
include ::Gitlab::Geo::VerificationState
include ::Geo::VerifiableRegistry
```
5. Test verification
6. Enable on staging, test with GitLab Environment Toolkit
7. Remove FF geo_lfs_object_verification
issue