Fix duplicated test case (#22016)
Fix duplicated test case (#22016)

This leads to races where we overwrite the previous tests output:
https://prow.istio.io/view/gcs/istio-prow/pr-logs/pull/istio_istio/21881/gencheck_istio/8020
smawson/istio,smawson/istio,istio/istio,smawson/istio,smawson/istio,istio/istio,smawson/istio,smawson/istio,istio/istio,istio/istio,istio/istio