Add support to td gateway in gcp_envoy_bootstrap.json (#38393)
Add support to td gateway in gcp_envoy_bootstrap.json (#38393)

* Add support to td gateway name in gcp_envoy_bootstrap.json

* Update gcp_envoy_bootstrap.json
istio/istio,istio/istio,istio/istio,istio/istio,istio/istio