Align util/libcrypto.num with the openssl-3.0 branch

OPENSSL_strcasecmp() and OPENSSL_strncasecmp() appeared in OpenSSL 3.0.3,
and were assigned numbers in util/libcrypto.num.  These numbers must be
transported up to the master branch as long as development of OpenSSL 3.x
is going on there (as indicated by the version info found in VERSION.dat).

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Todd Short <todd.short@me.com>
(Merged from https://github.com/openssl/openssl/pull/19357)