Add experimental flag for early exit on prerender error (#62367)
This adds an experimental flag to allow exiting during prerendering when
the first path errors instead of waiting until all prerendering is
finished to then fail the build.
x-ref: [slack
thread](https://vercel.slack.com/archives/C0676QZBWKS/p1708559793380989)
Closes: NEXT-2561
Closes NEXT-2563