Add test for the provider configuration module

We reuse test/provider_internal_test.c and test/p_test.c,
and get it loaded one more time via the configuration file
test/provider_internal_test.conf

To support different platform standards regarding module
extensions, we generate test/provider_internal_test.conf

Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/8549)