sha + chacha: Move AArch64/X86-64 dispatching to C. #3158

Job	Run time
amazon-corretto-crypto-provider	17m 58s
bind9	5m 3s
grpc	24m 46s
haproxy	2m 59s
libevent	28m 2s
ntp	2m 48s
OpenLDAP	17m 21s
openvpn	3m 51s
Python main	3m 33s
Python releases (FIPS=0 OPENSSL_IN_CRT=0)	12m 16s
socat	7m 54s
Python releases (FIPS=1 OPENSSL_IN_CRT=0)	12m 33s
strongswan	2m 17s
Python releases (FIPS=0 OPENSSL_IN_CRT=1)	12m 0s
tcpdump	1m 48s
Python releases (FIPS=1 OPENSSL_IN_CRT=1)	12m 6s
tpm2-tss	3m 26s
trousers	1m 22s
	2h 52m 3s

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