The generate tests in `app.component.spec.ts` are using `fixture.debugElement.componentInstance` whereas we can directly use `fixture.componentInstance`. This fixes the generated test to show a better example to users discovering unit tests.
Currently when using `ivy-ngcc` it will print out a warning
```
Failed to read entry point info from //node_modules/@schematics/angular/workspace/files/package.json with error SyntaxError: Unexpected token < in JSON at position 1121.
```
Fixes#13378