MasqueOhttpClient: Print chunked body to stdout

The code that gets the answer all at once, prints the response this way, and we've been using that to pipe it to a file. This CL adds the same functionality to the chunked mode. I've confirmed locally that I get valid JSON this way.

PiperOrigin-RevId: 906969022

quiche/quic/masque/masque_ohttp_client.cc

diff --git a/quiche/quic/masque/masque_ohttp_client.cc b/quiche/quic/masque/masque_ohttp_client.cc
index 3cc9cae..5acd4d8 100644
--- a/quiche/quic/masque/masque_ohttp_client.cc
+++ b/quiche/quic/masque/masque_ohttp_client.cc
@@ -1043,6 +1043,7 @@
   body_chunk_count_++;
   QUICHE_LOG(INFO) << "Received body chunk #" << body_chunk_count_
                    << " of size " << body_chunk.size();
+  std::cout << body_chunk;
   response_.body += body_chunk;
 
   if (response_chunk_callback_) {