MINOR: mux_quic/h3: report termination events at stream layer

MINOR: mux_quic/h3: report termination events at stream layer

This patch adds termination level on QUIC MUX at the stream layer.
Similarly to the previous patch, error codes should be similar to the
ones already used in H2.

Most of the values are reported via qcc_reset_stream() which have now an
extra argument for this. This is used by application protocol H3 and
hq-interop.

qmux_sctl() callback is extended to support MUX_SCTL_TEVTS to report the
current stream termination event at the upper layer.