[gitlab-org/gitlab] Offline transfer relation exports failing to fail

### ROOT CAUSE The `perform_failure` method in `BulkImports::RelationExportWorker` does not account for the `offline_export_id` parameter, causing non-batched relation exports to fail improperly and hang in the started state. ### CODE FIX

ruby
# In app/workers/bulk_imports/relation_export_worker.rb

class BulkImports::RelationExportWorker < BaseWorker
  # ... existing code ...

  def perform_failure(id, offline_export_id = nil)
    # Find the relation exports using the provided offline_export_id
    relation_exports = if offline_export_id
                         RelationExport.where(offline_export_id: offline_export_id)
                       else
                         RelationExport.where(id: id)
                       end

    relation_exports.update_all(state: :failed)
    # Optionally log the failure for debugging
    Gitlab::ApplicationContextSaver.current.save(log_context.merge(action: :relation_export_failure))
  end

  # ... existing code ...
end


This fix ensures that both batched and non-batched relation exports are correctly updated to the failed state when a failure occurs.