[tests] Add tests for examples (#9403)

These tests will run if one of the conditions is met:

- any change to `./examples`
- any changes to `./packages/frameworks`

The test ensures that examples can build and deploy without errors.

In a future PR, we could improve these tests to make requests to the
test deployment (like we do for probes).

examples/vue/package.json

@@ -5,6 +5,9 @@
     "build": "vue-cli-service build",
     "lint": "vue-cli-service lint"
   },
+  "engines": {
+    "node": "16.x"
+  },
   "dependencies": {
     "core-js": "^3.6.5",
     "vue": "^3.0.0"