feat(s2n-quic-core): add metrics trait #4856

Job	Run time
env	5s
s2n-quic-qns (debug)	2m 27s
s2n-quic-qns (release)	7m 3s
interop (aioquic, s2n-quic)	16m 34s
bench	18m 21s
attack (udp)	5m 26s
interop (chrome, s2n-quic)	5m 11s
h3spec (s2n-tls)	19s
interop (go-x-net, s2n-quic)	11m 26s
h3spec (rustls)	15s
perf (s2n-quic, s2n-quic)	1m 10s
perf (s2n-quic-null, s2n-quic-null)	50s
interop (kwik, s2n-quic)	13m 22s
interop (lsquic, s2n-quic)	12m 55s
interop (msquic, s2n-quic)	17m 19s
interop (mvfst, s2n-quic)	11m 14s
interop (neqo, s2n-quic)	15m 21s
interop (ngtcp2, s2n-quic)	13m 54s
interop (picoquic, s2n-quic)	16m 9s
interop (quic-go, s2n-quic)	13m 2s
interop (quiche, s2n-quic)	15m 37s
interop (quinn, s2n-quic)	13m 31s
interop (s2n-quic, aioquic)	15m 2s
interop (s2n-quic, go-x-net)	11m 1s
interop (s2n-quic, haproxy)	11m 39s
interop (s2n-quic, kwik)	13m 7s
interop (s2n-quic, lsquic)	11m 1s
interop (s2n-quic, msquic)	12m 25s
interop (s2n-quic, mvfst)	9m 49s
interop (s2n-quic, neqo)	12m 18s
interop (s2n-quic, nginx)	10m 6s
interop (s2n-quic, ngtcp2)	12m 56s
interop (s2n-quic, picoquic)	12m 0s
interop (s2n-quic, quic-go)	15m 7s
interop (s2n-quic, quiche)	11m 44s
interop (s2n-quic, quinn)	12m 13s
interop (s2n-quic, s2n-quic)	11m 42s
interop (s2n-quic, s2n-quic-rustls)	12m 8s
interop (s2n-quic, xquic)	11m 40s
interop (s2n-quic-rustls, s2n-quic)	12m 53s
interop (xquic, s2n-quic)	17m 0s
perf-report	9s
interop-report	15s
	7h 27m 46s

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