Add test to check OSSL_PROVIDER_load_ex() workd properly

[simo5]

Describe the feature
OSSL_PROVIDER_load_ex() was added to OpenSSL as a way to give configuration options to a provider that is dynamically loaded by an application w/o an openssl.cnf snippet.

Expected behavior
We should test that pkcs11-provider can be loaded and work with all of the config passed in as params passed to OSSL_PROVIDER_load_ex() and nothing in the openssl.nf file

Additional context
The CI should carry this test