test(a11y): Native delete icon too small on search input

[mfranzke]

This relates to a relatively new WCAG Success Criterion that expects a clickable area of at least 24 by 24 pixels, compare to 2.5.8 Target Size (Minimum).
As this is related to the natives input-elements part, we would need to check on both the possibility and the need to change something on this element.

https://db-ui.github.io/core/patterns/elements-input-input-search-filled/elements-input-input-search-filled.rendered.html