`@angular/pwa` is not needed as a dependency. This is because the pwa package is a schematic and is only used once when adding pwa capabilities to your application. After that, this package is not used anymore.
Closes#15764
With this change we remove the requirement to add tsickle as a dependency when having a workspace library.
Since the CTOR downlevel transformer which was previously provided via tsickle is now in ng-packagr version 5.5.1+ We migrate existing libraries to remove the need for tsickle.
