feat(s2n-quic-crypto): use scatter API with AWS-LC #2293

Job	Run time
build	7m 34s
clippy (stable, -D warnings)	2m 59s
clippy (beta)	3m 0s
rustfmt	31s
test	5m 49s
run-localhost (s2n-quic, request_response)	30s
run-localhost (s2n-quic, ping)	1m 14s
run-localhost (s2n-quic, connect)	19s
run-localhost (native-tls, request_response)	38s
run-localhost (native-tls, ping)	1m 25s
run-localhost (native-tls, connect)	21s
run-localhost (tcp, request_response)	24s
run-localhost (tcp, ping)	1m 15s
run-localhost (tcp, connect)	18s
run-localhost (s2n-tls, request_response)	23s
run-localhost (s2n-tls, ping)	1m 21s
run-localhost (s2n-tls, connect)	18s
report	26s
	28m 45s

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