Fix the pathing of CDK test bucket for ingest
Fix the pathing of CDK test bucket for ingest

This was called out in #1161

GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid