Improvements: Radio button

[mrosvik]

Related information and research findings:

• Radio in Aksel design system
• Radio in Entur design system
• Radio in Gov UK Design system
• There is a suggestion from OED to expand more information below each radio button: Expandable radio buttons
• https://github.com/digdir/designsystem/issues/563

Radio specification

• The whole radio button should be clickable (the circle, the gap and the label)
• When there is multiple lines with text, the circle should stay on top (next to the first line).
• Should use the new yellow focus style
• The label should be using label typography component
• Todo: add more technical specification

### Tasks
- [ ] https://github.com/digdir/designsystem/issues/522
- [ ] https://github.com/digdir/designsystem/issues/523
- [ ] https://github.com/digdir/designsystem/issues/524
- [ ] https://github.com/digdir/designsystem/issues/656