[EC] Unify scalar_mul_base point for ec_nistp curves #4618

Job	Run time
bind9	4m 59s
Cyrus-SASL	1m 12s
grpc	29m 1s
haproxy	4m 13s
nmap	2m 25s
ntp	2m 15s
OpenLDAP	16m 54s
Python main	3m 40s
Python releases (FIPS=0 OPENSSL_IN_CRT=0)	12m 59s
Python releases (FIPS=1 OPENSSL_IN_CRT=0)	12m 48s
socat	4m 49s
Python releases (FIPS=0 OPENSSL_IN_CRT=1)	11m 59s
tcpdump	1m 15s
Python releases (FIPS=1 OPENSSL_IN_CRT=1)	12m 35s
tpm2-tss	3m 35s
trousers	1m 17s
amazon-corretto-crypto-provider	22m 58s
libevent	29m 1s
openvpnMaster	4m 52s
openvpn2-6	3m 58s
strongswan	1m 53s
	3h 8m 38s

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