Fix Radio & Checkbox tests

Radio & Checkbox component test throw errors, pls fix this 😸

Example:

console.error
      Warning: You provided a `checked` prop to a form field without an `onChange` handler. This will render a read-only field. If the field should be mutable use `defaultChecked`. Otherwise, set either `onChange` or `readOnly`.
          at input
          at label
          at className (/Users/kristoffernordstrom/Documents/Workdir/sds-komponentbibliotek/packages/radio/RadioInputBase.tsx:23:3)

console.error
      Warning: React does not recognize the `data-testId` prop on a DOM element. If you intentionally want it to appear in the DOM as a custom attribute, spell it as lowercase `data-testid` instead. If you accidentally passed it from a parent component, remove it from the DOM element.
          at fieldset
          at className (/Users/kristoffernordstrom/Documents/Workdir/sds-komponentbibliotek/packages/checkbox/CheckboxFieldset.tsx:18:3)