Make `name` required in `additional-dependency-nodes`

[javierbrea]

Summary

The name property in additional-dependency-nodes should become required.

With the new object-based selector syntax, [custom dependency nodes can be referenced through nodeKinds, and name is the identifier used for that]](#386). Without name, an additional dependency node cannot be targeted from selectors, which makes it incomplete in the new model.

Why

• name is needed to reference custom dependency nodes from selectors.
• It makes the configuration more explicit and self-documenting.
• It avoids defining nodes that cannot be used by the selector system consistently.