[FIX] stock: check correct field name during import

Forward port: https://github.com/odoo/odoo/pull/120965 added in a check
to prevent setting a reserved qty when using an import file.
Unfortunately this field was renamed in saas-15.2 during
https://github.com/odoo/odoo/pull/80434/

Therefore this fix ensures that we check the new field name.

closes odoo/odoo#123287

X-original-commit: d86d5e0515dec8991452ba218bd9367b4ed71ef6
Signed-off-by: Tiffany Chang <tic@odoo.com>

addons/stock/models/stock_move_line.py

@@ -302,7 +302,7 @@ class StockMoveLine(models.Model):
                 vals['company_id'] = self.env['stock.picking'].browse(vals['picking_id']).company_id.id
             if vals.get('quant_id'):
                 vals.update(self._copy_quant_info(vals))
-            if self.env.context.get('import_file') and vals.get('product_uom_qty'):
+            if self.env.context.get('import_file') and vals.get('reserved_uom_qty'):
                 raise UserError(_("It is not allowed to import reserved quantity, you have to use the quantity directly."))
 
         mls = super().create(vals_list)