[FIX] website_sale: prevent selecting itself as an alternative product
[FIX] website_sale: prevent selecting itself as an alternative product

Part of https://github.com/odoo/odoo/pull/37135
task-2070507

X-original-commit: b289170f6c709b6869c034ba349b1d6ff4ab1dda
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo