libcrypto/libssl.num: Set the numbers for 3_4_0 symbols

Reviewed-by: Neil Horman <nhorman@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Paul Dale <ppzgs1@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/25393)

(cherry picked from commit 3e3a2bfc)