[FIX] stock: wrong UserError in intertransit

Usecase to reproduce:
Create a replenishment of warehouses sheme. E.g:
Production WH -> Distribution WH -> Shops
Set all the rules from SHOP to PRODUCTION as replenish on order.

Go to the replenishment report. Usererror due to a loop in the
rules.

It's wrong because he found twice the same rule that pull from
interwarehouse transit. Fix the code to handle intertransit rules

closes odoo/odoo#109640

Signed-off-by: William Henrotin (whe) <whe@odoo.com>

addons/stock/models/product.py

@@ -570,9 +570,12 @@ class Product(models.Model):
     def _get_rules_from_location(self, location, route_ids=False, seen_rules=False):
         if not seen_rules:
             seen_rules = self.env['stock.rule']
+        warehouse = location.warehouse_id
+        if not warehouse and seen_rules:
+            warehouse = seen_rules[-1].propagate_warehouse_id
         rule = self.env['procurement.group']._get_rule(self, location, {
             'route_ids': route_ids,
-            'warehouse_id': location.warehouse_id
+            'warehouse_id': warehouse,
         })
         if rule in seen_rules:
             raise UserError(_("Invalid rule's configuration, the following rule causes an endless loop: %s", rule.display_name))