[FIX] l10n_fr_pos_cert: show old price with taxes

Current behavior:
If you apply a discount on a product, the PoS ui will show the old price
without taxes.

Steps to reproduce:
- Install PoS and l10n_fr_pos_cert
- Create a product with a price of 100€ and a tax of 20%
- Create a pricelist with another price for the product (e.g. 80€)
- Open a PoS session
- Add the product to the order
- Apply the pricelist
- It show the old price as 100€ instead of 120€ (100€ + 20% tax)

opw-3211796

closes odoo/odoo#116836

X-original-commit: e5549d7a9962d92b1abc79d416c3c47303e06134
Signed-off-by: Heinz Robin (rhe) <rhe@odoo.com>
Signed-off-by: Engels Robin (roen) <roen@odoo.com>

addons/l10n_fr_pos_cert/static/src/xml/OrderReceipt.xml

@@ -16,7 +16,7 @@
                     Old unit price:
                     <span class="oldPrice">
                         <s>
-                            <t t-out="env.pos.format_currency(line.fixed_lst_price, 'Product Price')" /> / Units
+                            <t t-out="env.pos.format_currency(line.taxed_lst_unit_price, 'Product Price')" /> / Units
                         </s>
                     </span>
                 </div>

addons/l10n_fr_pos_cert/static/src/xml/Orderline.xml

@@ -8,7 +8,7 @@
                     Old unit price:
                     <span class="oldPrice">
                         <s>
-                            <t t-out="env.pos.format_currency(props.line.get_fixed_lst_price(),'Product Price')" /> / Units
+                            <t t-out="env.pos.format_currency(props.line.get_taxed_lst_unit_price(),'Product Price')" /> / Units
                         </s>
                     </span>
                 </li>

addons/point_of_sale/static/src/js/models.js

@@ -2344,8 +2344,9 @@ export class Orderline extends PosModel {
             tax: this.get_tax(),
             product_description: this.get_product().description,
             product_description_sale: this.get_product().description_sale,
-            pack_lot_lines: this.get_lot_lines(),
-            customer_note: this.get_customer_note(),
+            pack_lot_lines:      this.get_lot_lines(),
+            customer_note:      this.get_customer_note(),
+            taxed_lst_unit_price: this.get_taxed_lst_unit_price(),
         };
     }
     generate_wrapped_product_name() {