Fix ConfirmComplete with handshake de-duplication #4793

Job	Run time
env	7s
s2n-quic-qns (debug)	2m 26s
s2n-quic-qns (release)	6m 55s
bench	17m 35s
attack (udp)	5m 34s
interop (aioquic, s2n-quic)	16m 42s
interop (chrome, s2n-quic)	5m 23s
h3spec (s2n-tls)	25s
perf (s2n-quic, s2n-quic)	1m 13s
interop (go-x-net, s2n-quic)	11m 58s
h3spec (rustls)	13s
perf (s2n-quic-null, s2n-quic-null)	56s
interop (kwik, s2n-quic)	13m 21s
interop (lsquic, s2n-quic)	12m 51s
interop (msquic, s2n-quic)	17m 11s
interop (mvfst, s2n-quic)	11m 12s
interop (neqo, s2n-quic)	14m 21s
interop (ngtcp2, s2n-quic)	13m 43s
interop (picoquic, s2n-quic)	15m 45s
interop (quic-go, s2n-quic)	12m 46s
interop (quiche, s2n-quic)	19m 37s
interop (quinn, s2n-quic)	13m 37s
interop (s2n-quic, aioquic)	13m 16s
interop (s2n-quic, go-x-net)	11m 3s
interop (s2n-quic, haproxy)	16m 11s
interop (s2n-quic, kwik)	12m 34s
interop (s2n-quic, lsquic)	11m 19s
interop (s2n-quic, msquic)	12m 30s
interop (s2n-quic, mvfst)	10m 16s
interop (s2n-quic, neqo)	12m 28s
interop (s2n-quic, nginx)	10m 56s
interop (s2n-quic, ngtcp2)	11m 13s
interop (s2n-quic, picoquic)	13m 13s
interop (s2n-quic, quic-go)	10m 31s
interop (s2n-quic, quiche)	10m 40s
interop (s2n-quic, quinn)	12m 21s
interop (s2n-quic, s2n-quic)	12m 1s
interop (s2n-quic, s2n-quic-rustls)	11m 57s
interop (s2n-quic, xquic)	12m 15s
interop (s2n-quic-rustls, s2n-quic)	12m 21s
interop (xquic, s2n-quic)	15m 39s
perf-report	12s
interop-report	15s
	7h 27m 2s

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