[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/__tests__/integration/ionic-react.test.ts

@@ -0,0 +1,5 @@
+import { deployExample } from '../test-utils';
+it('should deploy', async () => {
+  await deployExample(__filename);
+});
+