[BugFix] WasmPlugin: Call forwardToEnvoy in the same thread (#39172)
[BugFix] WasmPlugin: Call forwardToEnvoy in the same thread (#39172)

* Call forwardToEnvoy in the same thread

* Update pkg/istio-agent/xds_proxy.go

Co-authored-by: John Howard <d864760d805af0f2f245f85d18382dd184bb0c60@google.com>

Co-authored-by: John Howard <d864760d805af0f2f245f85d18382dd184bb0c60@google.com>
istio/istio,istio/istio,istio/istio,istio/istio,istio/istio