Test grid is lying about our tests passing.

Example failure: https://circleci.com/gh/istio/istio/380325?utm_campaign=workflow-failed&utm_medium=email&utm_source=notification

Test grid for the test: https://testgrid.k8s.io/istio-presubmits#circleci-e2e-dashboard&width=20

Prow shows this as still running: https://prow.k8s.io/view/gcs/istio-circleci/presubmit/e2e-dashboard/380325

Test Grid just for this test shows ~20 tests still running, that should all be failures.