MINOR: quic: Implement qc_ssl_eary_data_accepted().

MINOR: quic: Implement qc_ssl_eary_data_accepted().

This function is a wrapper around SSL_get_early_data_status() for
OpenSSL derived stack and SSL_early_data_accepted() boringSSL derived
stacks like AWS-LC. It returns true for a TLS server if it has
accepted the early data received from a client.

Also implement quic_ssl_early_data_status_str() which is dedicated to be used
for debugging purposes (traces). This function converts the enum returned
by the two function mentionned above to a human readable string.