Add LFS object replication using SSF [RUN ALL RSPEC] [RUN AS-IF-FOSS]

What does this MR do?

Enables LFS replication using SSF behind a feature flag

Does this MR meet the acceptance criteria?

Conformity

• 📋 Does this MR need a changelog?
  • I have included a changelog entry.
  • I have not included a changelog entry because _____.
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team

Related to #276696 (closed)

Database

LfsObjectRegistryFinder

• Query:

  SELECT
    "lfs_object_registry".*
  FROM
    "lfs_object_registry"
  ORDER BY
    "lfs_object_registry"."id" ASC

• Query with id:

  SELECT
    "lfs_object_registry".*
  FROM
    "lfs_object_registry"
  WHERE
    "lfs_object_registry"."id" IN (10, 100, 1000)
  ORDER BY
    "lfs_object_registry"."id" ASC

• Plan:

  QUERY PLAN                                                                    
  ------------------------------------------------------------------------------------------------------ -------------------------------------------
  Index Scan using lfs_object_registry_pkey on lfs_object_registry  (cost=0.29..16.91 rows=3 width=116) 
  (actual time=0.329..0.350 rows=3 loops=1)
     Index Cond: (id = ANY ('{10,100,1000}'::bigint[]))
     Buffers: shared hit=11
   Planning Time: 0.808 ms
   Execution Time: 0.394 ms
  (5 rows)

LfsObject

• Query:

  SELECT
    "lfs_objects".*
  FROM
    "lfs_objects"
  WHERE
    "lfs_objects".\id " BETWEEN 1 AND 10000

• Plan

                        QUERY PLAN
  -------------------------------------------------------------
  Seq Scan on lfs_objects  (cost=0.00..1.06 rows=1 width=158)
     Filter: (id = 1)
  (2 rows)