feat(s2n-quic-dc): shrink path secret & fix fixed-map allocation (#2340) #4893

Job	Run time
env	6s
s2n-quic-qns (debug)	2m 38s
s2n-quic-qns (release)	7m 3s
h3spec (s2n-tls)	14s
perf (s2n-quic, s2n-quic)	1m 14s
h3spec (rustls)	15s
perf (s2n-quic-null, s2n-quic-null)	50s
bench	13m 38s
attack (udp)	5m 28s
interop (aioquic, s2n-quic)	15m 30s
interop (chrome, s2n-quic)	5m 3s
interop (go-x-net, s2n-quic)	11m 37s
interop (kwik, s2n-quic)	13m 24s
interop (lsquic, s2n-quic)	12m 59s
interop (msquic, s2n-quic)	18m 2s
interop (mvfst, s2n-quic)	12m 8s
interop (neqo, s2n-quic)	15m 38s
interop (ngtcp2, s2n-quic)	13m 43s
interop (picoquic, s2n-quic)	15m 52s
interop (quic-go, s2n-quic)	12m 36s
interop (quiche, s2n-quic)	19m 27s
interop (quinn, s2n-quic)	13m 13s
interop (s2n-quic, aioquic)	13m 37s
interop (s2n-quic, go-x-net)	11m 13s
interop (s2n-quic, haproxy)	16m 50s
interop (s2n-quic, kwik)	11m 37s
interop (s2n-quic, lsquic)	11m 11s
interop (s2n-quic, msquic)	12m 8s
interop (s2n-quic, mvfst)	11m 10s
interop (s2n-quic, neqo)	12m 32s
interop (s2n-quic, nginx)	10m 26s
interop (s2n-quic, ngtcp2)	12m 58s
interop (s2n-quic, picoquic)	12m 14s
interop (s2n-quic, quic-go)	15m 29s
interop (s2n-quic, quiche)	11m 49s
interop (s2n-quic, quinn)	12m 7s
interop (s2n-quic, s2n-quic)	12m 14s
interop (s2n-quic, s2n-quic-rustls)	12m 47s
interop (s2n-quic, xquic)	11m 51s
interop (s2n-quic-rustls, s2n-quic)	12m 38s
interop (xquic, s2n-quic)	17m 49s
perf-report	15s
interop-report	23s
	7h 33m 56s

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