[FIX] point_of_sale : impossible to open the pos

- Create a TAX A and TAX B
- Create a fiscal position, and TAX A in scr and TAX B in dest, and add other tax map
- Use this fiscal position in POS
- A month latter unactive TAX B (because the law have change).
--> You have an issue during opening the pos

closes odoo/odoo#80739

Signed-off-by: Masereel Pierre <pim@odoo.com>