explicitly use python3 to run perf benchmark script (#17575)
explicitly use python3 to run perf benchmark script (#17575)


smawson/istio,smawson/istio,istio/istio,istio/istio,smawson/istio,istio/istio,geeknoid/istio,geeknoid/istio,smawson/istio,geeknoid/istio,smawson/istio,geeknoid/istio,smawson/istio,istio/istio,geeknoid/istio,geeknoid/istio,istio/istio