Geo: Test upgrade "Migrate LFS objects into their own registry table" on an Omnibus 12.5 installation

Attempt to upgrade an Omnibus + Geo installation, and smoke test:

• !18415 (merged)

Also

• !19395 (merged)
• !19251 (merged)

Since we can't test Geo changes in staging or canary: &575 (closed)

cc @dbalexandre