Fix the socket BIO control methods to use ktls_crypto_info_t.

Fix the socket BIO control methods to use ktls_crypto_info_t.

This is mostly a cosmetic cleanup I missed when adding the
ktls_crypto_info_t type.  However, while fixing this I noticed that
the changes to extract the size from crypto_info from the wrapper
structure for Linux KTLS had not been propagated from bss_sock.c to
bss_conn.c, so I've fixed that to use the correct length.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Ben Kaduk <kaduk@mit.edu>
(Merged from https://github.com/openssl/openssl/pull/12782)