feat(s2n-quic-events): Adds metrics subscriber #4858

Job	Run time
env	4s
s2n-quic-qns (debug)	2m 22s
s2n-quic-qns (release)	7m 0s
bench	18m 56s
interop (aioquic, s2n-quic)	16m 23s
interop (chrome, s2n-quic)	5m 9s
attack (udp)	5m 32s
interop (go-x-net, s2n-quic)	11m 46s
h3spec (s2n-tls)	13s
perf (s2n-quic, s2n-quic)	1m 17s
interop (kwik, s2n-quic)	14m 20s
h3spec (rustls)	15s
perf (s2n-quic-null, s2n-quic-null)	1m 7s
interop (lsquic, s2n-quic)	13m 31s
interop (msquic, s2n-quic)	17m 21s
interop (mvfst, s2n-quic)	11m 35s
interop (neqo, s2n-quic)	15m 6s
interop (ngtcp2, s2n-quic)	13m 51s
interop (picoquic, s2n-quic)	16m 0s
interop (quic-go, s2n-quic)	13m 24s
interop (quiche, s2n-quic)	17m 40s
interop (quinn, s2n-quic)	14m 3s
interop (s2n-quic, aioquic)	13m 15s
interop (s2n-quic, go-x-net)	11m 7s
interop (s2n-quic, haproxy)	12m 25s
interop (s2n-quic, kwik)	11m 38s
interop (s2n-quic, lsquic)	11m 31s
interop (s2n-quic, msquic)	12m 5s
interop (s2n-quic, mvfst)	11m 54s
interop (s2n-quic, neqo)	13m 11s
interop (s2n-quic, nginx)	11m 17s
interop (s2n-quic, ngtcp2)	14m 4s
interop (s2n-quic, picoquic)	12m 12s
interop (s2n-quic, quic-go)	15m 19s
interop (s2n-quic, quiche)	11m 33s
interop (s2n-quic, quinn)	12m 35s
interop (s2n-quic, s2n-quic)	12m 31s
interop (s2n-quic, s2n-quic-rustls)	12m 54s
interop (s2n-quic, xquic)	12m 18s
interop (s2n-quic-rustls, s2n-quic)	13m 1s
interop (xquic, s2n-quic)	18m 53s
perf-report	23s
interop-report	22s
	7h 41m 23s

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