feat(s2n-quic-dc): shrink path secret & fix fixed-map allocation #4892

Job	Run time
env	5s
s2n-quic-qns (debug)	2m 36s
s2n-quic-qns (release)	7m 12s
bench	17m 41s
perf (s2n-quic, s2n-quic)	1m 12s
perf (s2n-quic-null, s2n-quic-null)	59s
h3spec (s2n-tls)	18s
attack (udp)	5m 27s
h3spec (rustls)	18s
interop (aioquic, s2n-quic)	16m 11s
interop (chrome, s2n-quic)	5m 7s
interop (go-x-net, s2n-quic)	11m 31s
interop (kwik, s2n-quic)	13m 15s
interop (lsquic, s2n-quic)	12m 27s
interop (msquic, s2n-quic)	17m 58s
interop (mvfst, s2n-quic)	11m 17s
interop (neqo, s2n-quic)	15m 9s
interop (ngtcp2, s2n-quic)	13m 51s
interop (picoquic, s2n-quic)	16m 5s
interop (quic-go, s2n-quic)	12m 13s
interop (quiche, s2n-quic)	17m 5s
interop (quinn, s2n-quic)	13m 29s
interop (s2n-quic, aioquic)	13m 14s
interop (s2n-quic, go-x-net)	11m 10s
interop (s2n-quic, haproxy)	11m 34s
interop (s2n-quic, kwik)	11m 36s
interop (s2n-quic, lsquic)	11m 4s
interop (s2n-quic, msquic)	13m 9s
interop (s2n-quic, mvfst)	13m 31s
interop (s2n-quic, neqo)	12m 9s
interop (s2n-quic, nginx)	10m 37s
interop (s2n-quic, ngtcp2)	13m 3s
interop (s2n-quic, picoquic)	12m 36s
interop (s2n-quic, quic-go)	10m 11s
interop (s2n-quic, quiche)	10m 42s
interop (s2n-quic, quinn)	11m 54s
interop (s2n-quic, s2n-quic)	11m 51s
interop (s2n-quic, s2n-quic-rustls)	13m 10s
interop (s2n-quic, xquic)	11m 39s
interop (s2n-quic-rustls, s2n-quic)	12m 27s
interop (xquic, s2n-quic)	15m 3s
perf-report	5s
interop-report	21s
	7h 22m 32s

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