Prior to this change in some cases errors tht happen during routing were not being surfaced. This is due to the fact that the router has floating promises, and the platform was being destroyed prior to these being settled.
PR Close#50587
Previously, with `mergeMap` we did not cancel previous subscriptions to zoneIsStable which caused the application to be stablized before hand.
Closes: #50562
PR Close#50573
This commits update the platform-server test structure to add 2 applications in the Angular CLI workspace one based on ngmodules and another standalone. The same E2E suit is ran on both apps.
PR Close#49927
