Fix ssg race condition (#3521)

* Fix server crash logging and opening fullstack apps

* Fix the event handler memory leak

* Add a regression test for memory leaks

* add a component to the memory leak test

* Fix race condition during SSG

* move route prerendering into a separate stage

* Fix static site generation with dx serve

* only proxy the fullstack server if ssg is disabled

* test nested-suspense with ssg in playwright