Retrieve all assets for given project and entity type.
GET /data/projects/{project_id}/asset-types/{asset_type_id}/assets
curl \
-X GET http://localhost:8080/api/data/projects/{project_id}/asset-types/{asset_type_id}/assets
curl \
-X GET http://localhost:8080/api/data/projects/{project_id}/asset-types/{asset_type_id}/assets