[FIX] sale: re-invoicing of multiple orders

Steps to reproduce the bug:
- Go to sales app > create two SO with different price lists
- Go to expense app > create a new expense
- Add two expense lines related to the two SO
- Click on the “Submit to Manager” button
- Approve the expense
- Click on “Post journal entries”
- An error is triggered

Problem:
We call the onchange_discount on all SO lines together in the “_sale_create_reinvoice_sale_line function”, while it should be called on each created line separately.

Bug introduced by this commit : https://github.com/odoo/odoo/commit/8815f4d9ab8620428d50abbe603c7f6c63076d6c

opw-2571247

closes odoo/odoo#72381

X-original-commit: 3cc4b573e95880d8f55692e986c159b7a8dc8b8d
Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>
Signed-off-by: Djamel Touati <DjamelTouati@users.noreply.github.com>

addons/sale/models/account_move_line.py

@@ -118,7 +118,8 @@ class AccountMoveLine(models.Model):
 
         # create the sale lines in batch
         new_sale_lines = self.env['sale.order.line'].create(sale_line_values_to_create)
-        new_sale_lines._onchange_discount()
+        for sol in new_sale_lines:
+            sol._onchange_discount()
 
         # build result map by replacing index with newly created record of sale.order.line
         result = {}