### What
Reland #64716
Removing the Suspense boundary on top of `next/dynamic` by default, make
it as `React.lazy` component with preloading CSS feature.
* Remove `suspense` option in `next/dynamic` since it's already
deprecated for a while
* Remove the default loading in app router implmentation of
`next/dynamic`
### Why
Extra Suspense boundary is causing extra useless rendering. For SSR, it
shouldn't render `loading` by default
Related: #64060
Related: #64687
Closes
[NEXT-3074](https://linear.app/vercel/issue/NEXT-3074/app-router-content-flickering-with-reactcreatecontext-and-nextdynamic)
This is sort of a breaking change, since removing the Suspense boundary
on top of `next/dynamic` by default. If there's error happening in side
the dynamic component you need to wrap an extra Suspense boundary on top
of it
1a04d94aae