No method to delete collection of resources?

It looks like there's `delete_item` and `delete_item_with_options` but I don't see any method to delete a collection of items - I guess it was just not needed before and it's OK to add one, right?

Start by locating the existing `delete_item` and `delete_item_with_options` methods in the Rust Kubernetes API implementation and read their surrounding API conventions. Determine the expected collection-delete behavior and how it should be exposed alongside those methods; done means the collection operation is defined and supported consistently.

Written by the indexing model from the issue text.