feat(s2n-quic-events): Adds metrics subscriber #4878

Job	Run time
env	4s
s2n-quic-qns (debug)	2m 24s
s2n-quic-qns (release)	7m 14s
bench	17m 47s
perf (s2n-quic, s2n-quic)	1m 20s
attack (udp)	5m 29s
perf (s2n-quic-null, s2n-quic-null)	58s
h3spec (s2n-tls)	14s
h3spec (rustls)	24s
interop (aioquic, s2n-quic)	18m 54s
interop (chrome, s2n-quic)	5m 11s
interop (go-x-net, s2n-quic)	11m 33s
interop (kwik, s2n-quic)	13m 36s
interop (lsquic, s2n-quic)	13m 2s
interop (msquic, s2n-quic)	14m 54s
interop (mvfst, s2n-quic)	11m 23s
interop (neqo, s2n-quic)	14m 56s
interop (ngtcp2, s2n-quic)	13m 52s
interop (picoquic, s2n-quic)	16m 11s
interop (quic-go, s2n-quic)	12m 44s
interop (quiche, s2n-quic)	20m 21s
interop (quinn, s2n-quic)	13m 58s
interop (s2n-quic, aioquic)	13m 16s
interop (s2n-quic, go-x-net)	11m 26s
interop (s2n-quic, haproxy)	11m 59s
interop (s2n-quic, kwik)	12m 6s
interop (s2n-quic, lsquic)	11m 15s
interop (s2n-quic, msquic)	12m 37s
interop (s2n-quic, mvfst)	9m 37s
interop (s2n-quic, neqo)	12m 22s
interop (s2n-quic, nginx)	10m 26s
interop (s2n-quic, ngtcp2)	13m 29s
interop (s2n-quic, picoquic)	12m 18s
interop (s2n-quic, quic-go)	10m 38s
interop (s2n-quic, quiche)	10m 45s
interop (s2n-quic, quinn)	12m 13s
interop (s2n-quic, s2n-quic)	12m 23s
interop (s2n-quic, s2n-quic-rustls)	12m 10s
interop (s2n-quic, xquic)	12m 32s
interop (s2n-quic-rustls, s2n-quic)	12m 3s
interop (xquic, s2n-quic)	16m 55s
perf-report	14s
interop-report	20s
	7h 27m 33s

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