Spdm-emu should read corresponding cert according to alias_cert model the when set cert

[Wenxing-hou]

spdm-emu/spdm_emu/spdm_requester_emu/spdm_requester_session.c

Lines 248 to 262 in 99115a2

	res = libspdm_read_responder_public_certificate_chain(m_use_hash_algo,
	m_use_asym_algo,
	&cert_chain_to_set,
	&cert_chain_size_to_set,
	NULL, NULL);
	if (!res) {
	printf("set certificate :read_responder_public_certificate_chain fail!\n");
	free(cert_chain_to_set);
	return LIBSPDM_STATUS_INVALID_CERT;
	}
	/*set_certificate for slot_id:0 in secure environment*/
	if ((m_exe_connection & EXE_CONNECTION_SET_CERT) != 0) {
	slot_id = 0;
	status = libspdm_set_certificate(spdm_context, NULL, slot_id,