MEDIUM: mux-quic/h3/hq-interop: use ncbuf for bidir streams

Add a ncbuf for data reception on qcs. Thanks to this, the MUX is able
to buffered all received frame directly into the buffer. Flow control
parameters will be used to ensure there is never an overflow.

This change will simplify Rx path with the future deletion of acked
frames tree previously used for frames out of order.
6 files changed