Tests redirecting with replace within an intercepted route.

• When loading an intercepted route we should be able to trigger a server action which calls redirect(‘..’, ‘replace’) with another intercepted route and we should see the updated route within the host page.
• Calling router.back() from within a client component present within the intercepted route should return us back to the host route.
• This allows an experience where the intercepted route “updates” through a server-side re-render without the user leaving the context of the host route.