docs(s2n-quic): add debugging section on GSO/GRO #5232

Job	Run time
env	8s
s2n-quic-qns (debug)	2m 34s
s2n-quic-qns (release)	4m 18s
attack (udp)	5m 38s
perf (s2n-quic, s2n-quic)	1m 23s
h3spec (s2n-tls)	14s
perf (s2n-quic-null, s2n-quic-null)	1m 15s
h3spec (rustls)	13s
interop (aioquic, s2n-quic)	19m 12s
interop (chrome, s2n-quic)	5m 30s
interop (go-x-net, s2n-quic)	14m 17s
interop (kwik, s2n-quic)	15m 32s
interop (lsquic, s2n-quic)	15m 1s
interop (msquic, s2n-quic)	19m 29s
interop (mvfst, s2n-quic)	13m 34s
interop (neqo, s2n-quic)	17m 33s
interop (ngtcp2, s2n-quic)	16m 41s
interop (picoquic, s2n-quic)	18m 8s
interop (quic-go, s2n-quic)	15m 24s
interop (quiche, s2n-quic)	19m 19s
interop (quinn, s2n-quic)	16m 35s
interop (s2n-quic, aioquic)	16m 47s
interop (s2n-quic, go-x-net)	11m 47s
interop (s2n-quic, haproxy)	11m 50s
interop (s2n-quic, kwik)	12m 33s
interop (s2n-quic, lsquic)	13m 22s
interop (s2n-quic, msquic)	14m 51s
interop (s2n-quic, mvfst)	11m 9s
interop (s2n-quic, neqo)	15m 4s
interop (s2n-quic, nginx)	11m 5s
interop (s2n-quic, ngtcp2)	14m 33s
interop (s2n-quic, picoquic)	13m 48s
interop (s2n-quic, quic-go)	11m 21s
interop (s2n-quic, quiche)	12m 17s
interop (s2n-quic, quinn)	14m 47s
interop (s2n-quic, s2n-quic)	14m 32s
interop (s2n-quic, s2n-quic-rustls)	17m 45s
interop (s2n-quic, xquic)	5m 48s
interop (s2n-quic-rustls, s2n-quic)	14m 7s
interop (xquic, s2n-quic)	9m 8s
perf-report	9s
interop-report	19s
	7h 49m 0s

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