Unblock --gfe2_reloadable_flag_quic_disable_version_q050.

Set external value to true (for Chrome and Envoy) to allow identifying potential
issues early.

PiperOrigin-RevId: 512611494

quiche/quic/core/quic_flags_list.h

diff --git a/quiche/quic/core/quic_flags_list.h b/quiche/quic/core/quic_flags_list.h
index f104c57..6211201 100644
--- a/quiche/quic/core/quic_flags_list.h
+++ b/quiche/quic/core/quic_flags_list.h
@@ -34,7 +34,7 @@
 // If true, disable QUIC version Q046.
 QUIC_FLAG(quic_reloadable_flag_quic_disable_version_q046, false)
 // If true, disable QUIC version Q050.
-QUIC_FLAG(quic_reloadable_flag_quic_disable_version_q050, false)
+QUIC_FLAG(quic_reloadable_flag_quic_disable_version_q050, true)
 // If true, disable QUIC version h3 (RFCv1).
 QUIC_FLAG(quic_reloadable_flag_quic_disable_version_rfcv1, false)
 // If true, disable QUIC version h3-29.