Problem/Motivation
To stick to the design system approach for claro the implementation for components should stick to predefined variants.
Proposed resolution
Since Add support for Dropbutton variants (3057581) is moved forward claro can rely on it.
Remaining tasks
- Test patch - Figure out how to solve views display settings: https://git.drupalcode.org/project/claro/blob/8.x-1.x/claro.theme#L435 (addressing in #1899236: Add new Splitbutton render element to eventually replace Dropbutton)