Add "no-fips-post" configure option.

Using this option disables the OpenSSL FIPS provider
self tests.
This is intended for debugging purposes only,
as it breaks FIPS compliance.

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/25063)