The `ListBoxSelection` component now properly handles
translations for the clear button based on the selected items:
- Fix `buttonLabel` and `description` to use the same translation logic
- Add tests for custom translations in both `ComboBox` and `MultiSelect`
`ListBoxSelection`, used by `MultiSelect` and `ComboBox`, currently
applies the wrong `aria-label` for the clear selection button. It uses
the `translateId` (e.g., `"clearAll"`) instead of the user-friendly copy.