[PERF] website_sale: do not load all the product tags

Checking on the searched products whether they have tags (through the field) before searching
for them is highly inefficient, will fill the orm records cache for "nothing",
and will be executed in slow, separate queries, highly slowing down the /shop
page loading time.

Part-of: odoo/odoo#142860

addons/website_sale/controllers/main.py

@@ -398,18 +398,15 @@ class WebsiteSale(payment_portal.PaymentPortal):
                     max_price = max_price if max_price >= available_min_price else available_max_price
                     post['max_price'] = max_price
 
-        if filter_by_tags_enabled:
-            if (
-                search_product.product_tag_ids
-                or search_product.product_variant_ids.additional_product_tag_ids
-            ):
-                ProductTag = request.env['product.tag']
-                all_tags = ProductTag.search(
-                    [('product_ids.is_published', '=', True), ('visible_on_ecommerce', '=', True)]
-                    + website_domain
-                )
-            else:
-                all_tags = []
+        if filter_by_tags_enabled and search_product:
+            ProductTag = request.env['product.tag']
+            all_tags = ProductTag.search(
+                expression.AND([
+                    [('product_ids.is_published', '=', True), ('visible_on_ecommerce', '=', True)],
+                    website_domain
+                ])
+            )
+
         categs_domain = [('parent_id', '=', False)] + website_domain
         if search:
             search_categories = Category.search(