pkg/util/net: fix quic streams leak (#3246)

pkg/util/net/conn.go

@@ -211,3 +211,8 @@ func (conn *wrapQuicStream) RemoteAddr() net.Addr {
 	}
 	return (*net.TCPAddr)(nil)
 }
+
+func (conn *wrapQuicStream) Close() error {
+	conn.Stream.CancelRead(0)
+	return conn.Stream.Close()
+}