MINOR: quic: reduce the private data size of QUIC cc algos

MINOR: quic: reduce the private data size of QUIC cc algos

After these commits:

    BUG/MINOR: quic: remove max_bw filter from delivery rate sampling
    BUG/MINOR: quic: fix BBB max bandwidth oscillation issue

where some members were removed from bbr struct, the private data
size of QUIC cc algorithms may be reduced from 160 to 144 uint32_t.

Should be easily backported to 3.1 alonside the commits mentioned above.

(cherry picked from commit eeaeb412dc978bdc9663061d9d2542dc1f7310cb)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>