Merge branch '258219-copy-designs-load-lfsobjects-in-batches' into 'master'

Batch load LfsObjects when copying designs

See merge request gitlab-org/gitlab!43638

app/services/design_management/copy_design_collection/copy_service.rb

@@ -259,7 +259,7 @@ module DesignManagement
         oids = blobs.values.flat_map(&:values).map(&:lfs_oid)
         repository_type = LfsObjectsProject.repository_types[:design]
 
-        new_rows = LfsObject.where(oid: oids).map do |lfs_object|
+        new_rows = LfsObject.where(oid: oids).find_each(batch_size: 1000).map do |lfs_object|
           {
             project_id: target_project.id,
             lfs_object_id: lfs_object.id,