product_attribute_value_avoid_auto_fill

Purpose

Allow users to skip automatic filling of attribute values on attributes that do not generate product variants.

Features

product.attribute: Adds an avoid_fill_all_values option (visible when variant creation is Never) that defaults to enabled.
product.template.attribute.line: When an attribute has avoid_fill_all_values enabled and variant creation is Never, selecting it on a product template leaves value_ids empty instead of auto-filling all values.