Add video tutorial link to the Deep Links panel (#9925)
* Add tutorialVideoUrl field to ScreenMetaData for deep links video
* Update VideoTutorialLink to support custom video URLs
Use the tutorialVideoUrl from ScreenMetaData when available,
falling back to the default DevTools YouTube video timestamp.
* Use youtu.be short URL format for deep links tutorial video
* Move deep links tutorial video URL to a named constant
* Assert that VideoTutorialLink has a video URL or timestamp
* Add release notes entry for deep links tutorial link
