Add a dummy call to BN_rand_ex() in the FIPS provider
Add a dummy call to BN_rand_ex() in the FIPS provider

The previous commit made BIGNUM RAND operations available from within
the FIPS provider. We test this out by making a dummy call to check it
completes successfully.

Reviewed-by: Matthias St. Pierre <1910231d24f125aceac7850dc92279eee8d52323@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/9193)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl