add support for IMAGE_SCRIPTS archive

BUG=b:254115543
TEST=run_tests

Change-Id: I7d8cb64fefac13ea4aa09bc9eaff7c3ddfc874ab
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/4072687
Tested-by: Jack Neus <jackneus@google.com>
Reviewed-by: Alex Klein <saklein@chromium.org>
Commit-Queue: Jack Neus <jackneus@google.com>
Reviewed-by: Madeleine Hardt <hardtmad@google.com>
diff --git a/api/controller/image_unittest.py b/api/controller/image_unittest.py
index 57e64db..4641c08 100644
--- a/api/controller/image_unittest.py
+++ b/api/controller/image_unittest.py
@@ -237,6 +237,7 @@
         common_pb2.ArtifactsByService.Image.ArtifactType.LICENSE_CREDITS: image_service.copy_license_credits,
         common_pb2.ArtifactsByService.Image.ArtifactType.FACTORY_IMAGE: image_service.create_factory_image_zip,
         common_pb2.ArtifactsByService.Image.ArtifactType.STRIPPED_PACKAGES: image_service.create_stripped_packages_tar,
+        common_pb2.ArtifactsByService.Image.ArtifactType.IMAGE_SCRIPTS: image_service.create_image_scripts_archive,
     }
 
     def setUp(self):