Disallow certs with explicit curve in verification chain

The check is applied only with X509_V_FLAG_X509_STRICT.

Fixes #12139

Reviewed-by: David von Oheimb <david.von.oheim

Disallow certs with explicit curve in verification chain

The check is applied only with X509_V_FLAG_X509_STRICT.

Fixes #12139

Reviewed-by: David von Oheimb <david.von.oheimb@siemens.com>
Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/12683)

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