Don't restrict what EVP_PKEY_Q_keygen can be used for

Don't restrict what EVP_PKEY_Q_keygen can be used for

The EVP_PKEY_Q_keygen function contains a list of algorithm type names
and fails if the requested name is not in the list. This prevents the use
of this function for externally supplied key type names.

We should just assume that any unrecognised key type name does not require
a parameter.

Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Paul Dale <ppzgs1@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/25468)