This update improves the payment process by adding debtor and creditor information to the data sent to Odoofin, which is required for initiating payments through Powens and Saltedge. This change ensures smoother and more complete payment initiation workflows. It's a necessary improvement for supporting key payment integrations.

In order to be able to initiate payments using Powens and Saltedge, we
need to include debtor information in the payload sent to Odoofin. This
commit adds the necessary fields and updates the tests accordingly.

Task ID: 5977148, 6095729

Forward-Port-Of: odoo/enterprise#119843