QUIC v2 has been published as RFC 9369. Rename all identifiers from "v2 draft 08" to "rfc v2". No behavior change. Also renames the not-enabled flag gfe2_reloadable_flag_quic_enable_version_2_draft_08 to gfe2_reloadable_flag_quic_enable_version_rfcv2.

Protected by FLAGS_gfe_reloadable_flag_enable_version_rfcv2.

PiperOrigin-RevId: 537351342
diff --git a/quiche/quic/core/quic_connection_test.cc b/quiche/quic/core/quic_connection_test.cc
index 46f1615..54b671a 100644
--- a/quiche/quic/core/quic_connection_test.cc
+++ b/quiche/quic/core/quic_connection_test.cc
@@ -10117,7 +10117,7 @@
 
   uint8_t* retry_packet;
   size_t retry_packet_length;
-  if (version() == ParsedQuicVersion::V2Draft08()) {
+  if (version() == ParsedQuicVersion::RFCv2()) {
     retry_packet = retry_packet_rfcv2;
     retry_packet_length = ABSL_ARRAYSIZE(retry_packet_rfcv2);
   } else if (version() == ParsedQuicVersion::RFCv1()) {