next.js

866537b2 - Support fallback params when the layout is a client component (#70329)

Support fallback params when the layout is a client component (#70329) Stacked on #70328 When fallback params are passed to a layout we need to treat client component layouts special because passing the fallback params to the client component is otherwise enough to make them postpone. This change introduces a similar abstraction that we use for client component Pages where we pass our Page component to a PageRoot component which reifies the dynamically tracked params from the underlying params.