[FIX] sale_mrp: quantity invoiced in cogs is different than qty delivered

When a kit is exploded to `stock.move` the quantity is rounded half-up
for every move. But during the invoice. The quantity to invoice on
kit is rounded up so it could result in differences between the
inventory valuation and the cost of the product

closes odoo/odoo#81355

Signed-off-by: Arnold Moyaux <arm@odoo.com>

addons/sale_mrp/models/sale_mrp.py

@@ -67,7 +67,7 @@ class SaleOrderLine(models.Model):
                         order_line.qty_delivered = 0.0
 
     def _get_bom_component_qty(self, bom):
-        bom_quantity = self.product_id.uom_id._compute_quantity(1, bom.product_uom_id)
+        bom_quantity = self.product_id.uom_id._compute_quantity(1, bom.product_uom_id, rounding_method='HALF-UP')
         boms, lines = bom.explode(self.product_id, bom_quantity)
         components = {}
         for line, line_data in lines: