Since v15, prod mode is handled by the CLI with the `optimization` flag. We can remove the environement files and `enableProdMode` when the tests use the CLI.
PR Close#49746
- This update is needed to implement the changes in `ng add localize` https://github.com/angular/angular/pull/47569
- Add missing `root` options to all `angular.json`, this is required as otherwise the angular.json validation will fail.
- Remove `require.context` from test.ts integration test, as this is no longer needed.
- Update payloads golden files.
PR Close#47584
