How to exclude SKUs without List Price from a Product based on the Price Group

Summary:

When a product has multiple SKUs based on the variant properties, how to exclude SKUs which do not have list price on the current price-group?

As of not SKU is retrieved and displayed with "Price Unavailable" message.

This is useful in a use case when the same product has to be sold across regions (or based on the pricegroup).

If the price group associated to site, contract or shopper-context, does not contain SKU on it, and a product does not have list price for it, the SKU should be excluded from listing. This allows to keep SKU on the product while restricting items based on the pricegroup.