Do not pick product at the destination location

It is forbidden to create move with the same source and destination locations.
To avoid this case, we remove the destination location from the quantities to
pick.

issue7856
review66541002

move.py

@@ -881,6 +881,8 @@ class Move(Workflow, ModelSQL, ModelView):
                     location_qties[location] = Uom.compute_qty(
                         move.product.default_uom, pbl[key], move.uom,
                         round=False)
+            # Prevent to pick from the destination location
+            location_qties.pop(move.to_location, None)
 
             to_pick = move.pick_product(location_qties)