Move `ensure_batched_background_migration_is_finished` to the correct helper
Move ensure_batched_background_migration_is_finished
to its dedicated module:
Gitlab::Database::Migrations::BatchedBackgroundMigrationHelpers
Edited by Diogo Frazão
Move ensure_batched_background_migration_is_finished
to its dedicated module:
Gitlab::Database::Migrations::BatchedBackgroundMigrationHelpers