fetch worker script: abort if response status is not ok (lint)

{"fail_fast": false, "matrix": [{"name": "Lint", "workflow": "lint", "wpt": false, "profile": "release", "unit_tests": false, "build_libservo": false, "bencher": false, "build_args": "", "wpt_args": "", "number_of_wpt_chunks": 20}]}

Author: Gae24