Add flag count for --quic_tls_allow_ignore_ticket_open.

PiperOrigin-RevId: 382094193

quic/core/tls_server_handshaker.cc

diff --git a/quic/core/tls_server_handshaker.cc b/quic/core/tls_server_handshaker.cc
index ab17ac2..b90f91f 100644
--- a/quic/core/tls_server_handshaker.cc
+++ b/quic/core/tls_server_handshaker.cc
@@ -778,6 +778,7 @@
   }
 
   if (allow_ignore_ticket_open_) {
+    QUIC_RELOADABLE_FLAG_COUNT(quic_tls_allow_ignore_ticket_open);
     const uint8_t* unused_extension_bytes;
     size_t unused_extension_len;
     ticket_received_ = SSL_early_callback_ctx_extension_get(