[IMP] sale_stock: custom group on so line

Allow to create a specific procurement group for
each so line. The purpose for different group is to
have a specific behavior for each delivery depending
it's group. It also allow to pass extra values to
procurement group creation that would be common between
multiple line (instead of passing the common values to
each lines values argument).

closes odoo/odoo#33765

Signed-off-by: Arnold Moyaux <amoyaux@users.noreply.github.com>

addons/sale_stock/models/sale_order.py

@@ -370,6 +370,17 @@ class SaleOrderLine(models.Model):
                 qty -= move.product_uom._compute_quantity(move.product_uom_qty, self.product_uom, rounding_method='HALF-UP')
         return qty
 
+    def _get_procurement_group(self):
+        return self.order_id.procurement_group_id
+
+    def _prepare_procurement_group_vals(self):
+        return {
+            'name': self.order_id.name,
+            'move_type': self.order_id.picking_policy,
+            'sale_id': self.order_id.id,
+            'partner_id': self.order_id.partner_shipping_id.id,
+        }
+
     @api.multi
     def _action_launch_stock_rule(self, previous_product_uom_qty=False):
         """
@@ -386,13 +397,9 @@ class SaleOrderLine(models.Model):
             if float_compare(qty, line.product_uom_qty, precision_digits=precision) >= 0:
                 continue
 
-            group_id = line.order_id.procurement_group_id
+            group_id = line._get_procurement_group()
             if not group_id:
-                group_id = self.env['procurement.group'].create({
-                    'name': line.order_id.name, 'move_type': line.order_id.picking_policy,
-                    'sale_id': line.order_id.id,
-                    'partner_id': line.order_id.partner_shipping_id.id,
-                })
+                group_id = self.env['procurement.group'].create(line._prepare_procurement_group_vals())
                 line.order_id.procurement_group_id = group_id
             else:
                 # In case the procurement group is already created and the order was