Adapt EVP_CIPHER_{param_to_asn1,asn1_to_param} for use with provider.

Adapt EVP_CIPHER_{param_to_asn1,asn1_to_param} for use with provider.

So far, these two funtions have depended on legacy EVP_CIPHER
implementations to be able to do their work.  This change adapts them
to work with provided implementations as well, in one of two possible
ways:

1.  If the implementation's set_asn1_parameters or get_asn1_parameters
    function pointers are non-NULL, this is a legacy implementation,
    and that function is called.
2.  Otherwise, if the cipher doesn't have EVP_CIPH_FLAG_CUSTOM_ASN1
    set, the default AlgorithmIdentifier parameter code in libcrypto
    is executed.
3.  Otherwise, if the cipher is a provided implementation, the ASN1
    type structure is converted to a DER blob which is then passed to
    the implementation as a parameter (param_to_asn1) or the DER blob
    is retrieved from the implementation as a parameter and converted
    locally to a ASN1_TYPE (asn1_to_param).

With this, the old flag EVP_CIPH_FLAG_DEFAULT_ASN1 has become
irrelevant and is simply ignored.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10008)