Create libcrypto support for BIO_new_from_core_bio()

Create libcrypto support for BIO_new_from_core_bio()

Previously the concept of wrapping an OSSL_CORE_BIO in a real BIO was an
internal only concept for our own providers. Since this is likely to be
generally useful, we make it a part of the public API.

Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15072)