Fix Reset logic in PendingStream. Pending streams are now only used as read-unidirectional streams. As pointed in https://tools.ietf.org/html/draft-ietf-quic-transport-23#section-19.4, the stream shouldn't send any RESET_STREAM frame. gfe-relnote: protected by disabled v99 flag. PiperOrigin-RevId: 276570554 Change-Id: Ie0bd05af05af9d088d491357561fea3015b5503b