Add a test for TLSv1.3 only client sending a correct key_share

Make sure that a TLSv1.3 only client does not send a TLSv1.3 key_share.

Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19404)