Merge branch '212566-foss-design-management-lib' into 'master'

app/services/projects/import_export/export_service.rb

ee/app/services/design_management/delete_designs_service.rb

ee/app/services/design_management/save_designs_service.rb

ee/app/services/ee/projects/import_export/export_service.rb

ee/lib/ee/api/entities/design_management/design.rb

ee/lib/ee/api/entities/todo.rb

ee/lib/ee/banzai/filter/issue_reference_filter.rb

ee/lib/ee/gitlab/import_export.rb

ee/lib/ee/gitlab/import_export/importer.rb

ee/lib/ee/gitlab/import_export/project/object_builder.rb

ee/lib/ee/gitlab/import_export/project/relation_factory.rb

ee/lib/ee/gitlab/uploads/migration_helper.rb

ee/lib/ee/gitlab/url_builder.rb

ee/lib/ee/gitlab/usage_data.rb

ee/spec/lib/banzai/filter/issue_reference_filter_spec.rb

...lib/ee/gitlab/import_export/project/tree_restorer_spec.rb

...ec/lib/ee/gitlab/import_export/project/tree_saver_spec.rb

ee/spec/lib/ee/gitlab/url_builder_spec.rb

ee/spec/lib/ee/gitlab/usage_data_spec.rb

ee/spec/lib/gitlab/gl_repository/repo_type_spec.rb