Skips additional production-only tests.
Follow-up to #56089.
In this PR I went through all of `test/integration` looking for `nextBuild(` and added the skipping logic.
This PR merges the app renderer worker into the router process. This
improves the memory overhead mostly.
There're future work to do to get rid of the IPC server for router and
app renderer, as they're now merged in one process.
Fixes NEXT-1492
- Enables excludeDefaultMomentLocales by default
- Adds distDir cleaning (See RFC #6009)
- Adds support for `PORT`
- Removes `router.events` from the server-side router as it should not be used server-side (long-standing todo that is potentially breaking). Note that it's still available as `Router.events` (import Router from 'next/router') and with `useRouter` in `useEffect`. Using it with `useEffect` is the correct way and I've updated the upgrading guide to reflect that
- Added webpack 5 to the upgrading guide
- Removed `Head.rewind` as it's been a no-op since Next.js 9.5 and can now be safely removed from user code
Fixes#11408Fixes#10338Fixes#5554
## Bug
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
## Feature
- [x] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [x] Related issues linked using `fixes #number`
- [x] Integration tests added
- [x] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
## Documentation / Examples
- [ ] Make sure the linting passes
* Disable concurrency for tests
* Add browser instance sharing
* Bump concurrency and install chromedriver smoother
* Fix config typo
* Fix local test
* Limit azure concurrency again
* Add delay for empty-object-test
* Make sure to use open port for chromedriver
* Move browser closing to jest-environment
* Re-enable concurrency for Azure
* bump
* Disable concurrency for Azure again
* Re-enable concurrency for Azure
* bump
* Add experimental optimizeLibraries flag, currently prunes Moment.js locales
* expose moment for use in assertion
* try with the same setup as the production integration test
* Apply optimiztaions in dev and on server so they're consistent.
* fix build (oh dear)
* Update index.test.js
* Rename flag to future.excludeDefaultMomentLocales
* Adjust impl
