Istio envoy 1.7 branch tsan test always fails. Here is an example failed run: https://prow.istio.io/view/gs/istio-prow/pr-logs/pull/istio_envoy/293/test-tsan_envoy_release-1.7/1354917515653812224

To temporarily work around that, we will make tsan test option there, and use this issue to track fixing and enabling it again.