This fixes an issue in the Spanish point-of-sale TicketBAI integration that could prevent the system from calling the needed backend process. It helps ensure Spanish POS tax reporting continues to work correctly after the saas-17.2 update.

Previously, in the fw-port of the original l10n_es_pos_tbai PR for saas-17.2, it was merged without knowing that the `orm.call` doesn't work anymore. We needed to use `this.pos.data.call` instead.

task-id: 3916236