build(docs-infra): switch docs examples to Ivy (#36143)

The docs examples are switched to Ivy. On CI, the tests are run with
both Ivy and ViewEngine.

Partially addresses:
[FW-1609](https://angular-team.atlassian.net/browse/FW-1609)

PR Close #36143

aio/tools/examples/shared/boilerplate/cli/tsconfig.json

@@ -20,7 +20,6 @@
     ]
   },
   "angularCompilerOptions": {
-    "enableIvy": false,
     "fullTemplateTypeCheck": true,
     "strictInjectionParameters": true
   }