Ignore storage types constraints on quants in cells

When the putaway selects a tray and a cell according to the storage
type, we still want the user to be able to override the selection by
scanning another tray type.

stock_vertical_lift_storage_type/models/__init__.py

@@ -1,3 +1,4 @@
 from . import stock_location
 from . import stock_location_tray_type
+from . import stock_quant
 from . import vertical_lift_operation_put

stock_vertical_lift_storage_type/models/stock_quant.py

@@ -0,0 +1,18 @@
+# Copyright 2020 Camptocamp SA
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl)
+from odoo import models
+
+
+class StockQuant(models.Model):
+
+    _inherit = "stock.quant"
+
+    def _check_storage_type(self):
+        # disable the checks when placing goods in vertical lift cells:
+        # we still want to benefit of the storage type rules to select
+        # a destination, but we want to allow selecting a different tray
+        # type
+        self = self.filtered(
+            lambda quant: quant.location_id.vertical_lift_kind != "cell"
+        )
+        super()._check_storage_type()