Add `--debug-prerender` option for `next build` (#80667)
When running `next build --debug-prerender`, we will set a few experimental flags that ensure the following:
- No minification is applied to server code.
- `experimental.serverMinification = false`, or
- `experimental.turbopackMinify = false`
- Source maps for server bundles are generated.
- `experimental.serverSourceMaps = true`
- Source maps are consumed by Node.js in the spawned child processes that prerender the routes.
- `experimental.enablePrerenderSourceMaps = true`
- The build is not exited after the first error to show a complete list of prerender errors.
- `experimental.prerenderEarlyExit = false`
While `next dev` remains the primary recommended way to debug prerender errors when `dynamicIO` is enabled, this build option does offer an alternative to get a more usable build output, with readable stacks and code frames.
**Note:** For performance reasons, artifacts generated with `next build --debug-prerender` should not be deployed to production. This mode is only intended for debugging purposes.
Closes NAR-142
