[Design review] Notification

[8OYx4JT4MsadkJ5CPwN52Fdm7fbRLSNYd0h4y5I]

• [x] Link ("Action") should be a ghost button
• [x] Link ("Action") should use $link-inverse token for High contrast notifications.
• [x] Layouts, expecially for multiline should follow this guideline

[CY1FXz75x1YZoF5iScZcylWTjPMEV1XeqPWVASf]

@Mariusz-Mickiewicz that ghost button text should use the $link-inverse token so it has contrast accessibility. It will actually be blue 40 ... right now it looks like it's still blue 60

[WYXEhlEtzb2Gfe6HgrQLAf6MeMEatE77yYzHHIH]

Changed to button and color linkInverse.

Because it is now a ghost button it has top padding pushing it down

[WYXEhlEtzb2Gfe6HgrQLAf6MeMEatE77yYzHHIH]

To note the Action is not defined but the component and is just whatever the user passes in. So only change was to the Example/Test app. not the library.