This update adds test data related to a new payment method, 'pos_iot_six,' to the Odoo configuration tests. This ensures that the system can properly handle this payment option during testing and development, supporting future integration and validation.

Adding pos iot six payment method to the test data of the pos_config.

Related to Odoo pr https://github.com/odoo/odoo/pull/262184

Forward-Port-Of: odoo/enterprise#118531