oobmigration: Bulkhead migrators
Created by: efritz
This PR moves the migrators defined in the oobmigration package into a subpackage. This will make it easier to move in preparation for https://github.com/sourcegraph/sourcegraph/pull/29059.
Created by: efritz
This PR moves the migrators defined in the oobmigration package into a subpackage. This will make it easier to move in preparation for https://github.com/sourcegraph/sourcegraph/pull/29059.