Since multi-website 4f6ec1cd2a, `website_published` became a computed field
and `is_published` was introduced for storing the old `website_published` value
Still, old SQL select was trying to read `website_published` instead of
`is_published`.
Step to reproduce:
- Create a Membership Product
- Create a Membership Customer
- Add the Membership to the Customer (Buy Membership)
- Publish the Customer
- Go to /members, it will error 500
closesodoo/odoo#29412