dump envoy config_dump and clusters info to perf GCS bucket (#856)
dump envoy config_dump and clusters info to perf GCS bucket (#856)

* dump envoy config_dump and clusters info to perf GCS bucket

* address comment

* use kubeclt exec instead of port-forward
istio/tools,istio/tools,istio/tools,istio/tools,istio/tools,istio/tools