[FIX] website_sale: searchbar also search product code

Step to reproduce:
- Search code of product in website_sale search bar

Current Bheaviour:
- No result

Behaviour after PR:
- Search also try to match , similar behaviour to V14 and before

opw-2737648

closes odoo/odoo#86921

X-original-commit: 395643d1377750577f3588506035623f9d0489c9
Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>

addons/website_sale/models/product_template.py

@@ -415,10 +415,11 @@ class ProductTemplate(models.Model):
                     ids = [value[1]]
             if attrib:
                 domains.append([('attribute_line_ids.value_ids', 'in', ids)])
-        search_fields = ['name']
+        search_fields = ['name', 'product_variant_ids.default_code']
         fetch_fields = ['id', 'name', 'website_url']
         mapping = {
             'name': {'name': 'name', 'type': 'text', 'match': True},
+            'product_variant_ids.default_code': {'name': 'product_variant_ids.default_code', 'type': 'text', 'match': True},
             'website_url': {'name': 'website_url', 'type': 'text', 'truncate': False},
         }
         if with_image: