[FW][FIX] (website_)sale: Perf improvement on /shop loading

closes odoo/odoo#83215

Forward-port-of: #81767
X-original-commit: cb19f45ae8180247101cf4aafec2a1fe769772ff
Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>

addons/sale/models/product_template.py

@@ -234,7 +234,7 @@ class ProductTemplate(models.Model):
                 price = pricelist._get_product_price(product, quantity)
             else:
                 price = list_price
-            display_image = bool(product.image_1920)
+            display_image = bool(product.image_128)
             display_name = product.display_name
             price_extra = (product.price_extra or 0.0) + (sum(no_variant_attributes_price_extra) or 0.0)
         else:
@@ -246,7 +246,7 @@ class ProductTemplate(models.Model):
                 price = pricelist._get_product_price(product_template, quantity)
             else:
                 price = list_price
-            display_image = bool(product_template.image_1920)
+            display_image = bool(product_template.image_128)
 
             combination_name = combination._get_combination_name()
             if combination_name:

addons/website_sale/models/product_template.py

@@ -234,11 +234,11 @@ class ProductTemplate(models.Model):
         :rtype: recordset of 'product.template' or recordset of 'product.product'
         """
         self.ensure_one()
-        if self.image_1920:
+        if self.image_128:
             return self
         variant = self.env['product.product'].browse(self._get_first_possible_variant_id())
         # if the variant has no image anyway, spare some queries by using template
-        return variant if variant.image_variant_1920 else self
+        return variant if variant.image_variant_128 else self
 
     def _get_current_company_fallback(self, **kwargs):
         """Override: if a website is set on the product or given, fallback to