[FIX] point_of_sale: reconcile invoice anglo-saxon lines

Reconcile the stock output lines of the pos.order invoice
for products with real-time valuation. This is to be more
consistent with the sales module.

closes odoo/odoo#35901

Task-id: 2048668
Signed-off-by: pimodoo <pimodoo@users.noreply.github.com>