extproc: ext_proc: propagate tracing context

Signed-off-by: Fernando Cainelli <fernando.cainelli-external@getyourguide.com>

source/extensions/filters/http/ext_proc/client_impl.cc

@@ -40,7 +40,8 @@ bool ExternalProcessorStreamImpl::startStream(
  const Http::AsyncClient::StreamOptions& options) {
  client_ = std::move(client);
  auto descriptor = Protobuf::DescriptorPool::generated_pool()->FindMethodByName(kExternalMethod);
- grpc_context_ = options.parent_context stream_ = client_.start(*descriptor, *this, options);
+ grpc_context_ = options.parent_context;
+ stream_ = client_.start(*descriptor, *this, options);
  // Returns true if the start succeeded and returns false on start failure.
  return stream_ != nullptr;
 }