This lets us skip src/facade/exception* when compiling modules other than core. It prevents having many conflicting declarations
BREAKING CHANGE: - deprecations: * `withProviders`, use `TestBed.withModule` instead * `addProviders`, use `TestBed.configureTestingModule` instead * `TestComponentBuilder`, use `TestBed.configureTestModule` / `TestBed.override...` / `TestBed.createComponent` instead. Closes #10354