TUN-8006: Update quic-go to latest upstream

vendor/github.com/quic-go/quic-go/sys_conn_df.go

@@ -1,15 +1,22 @@
-//go:build !linux && !windows
+//go:build !linux && !windows && !darwin
 
 package quic
 
-import "syscall"
+import (
+	"syscall"
+)
 
-func setDF(rawConn syscall.RawConn) error {
+func setDF(syscall.RawConn) (bool, error) {
 	// no-op on unsupported platforms
-	return nil
+	return false, nil
 }
 
-func isMsgSizeErr(err error) bool {
+func isSendMsgSizeErr(err error) bool {
+	// to be implemented for more specific platforms
+	return false
+}
+
+func isRecvMsgSizeErr(err error) bool {
 	// to be implemented for more specific platforms
 	return false
 }