test flake: Envoy Filter retries

[craigbox]

https://prow.istio.io/view/gs/istio-prow/pr-logs/pull/istio_istio.io/15574/doc.test.profile-demo_istio.io/1826782762380562432

https://storage.googleapis.com/istio-prow/pr-logs/pull/istio_istio.io/15574/doc.test.profile-demo_istio.io/1826782762380562432/artifacts/tests-setup-profile-demo-b309e2/TestDocs/tasks/policy-enforcement/rate-limit/test.sh/test.sh/_test_context/test.sh_output.txt

VERIFY FAILED snip_verify_global_rate_limit_2 (timeout after 120s):
received:
"429
429
200"
expected:
"200
200
429"