Partial fixes for sample list generator (#1464)

* Partial fixes for sample list generator

A number of fixes for the sample list generator:

- Removes a comment from one of our manifest files, as we don't
  currently support JSONC.
- Ignores the `node_modules` folder since we have recently added some AI
  samples with a build step.
- Adds the `aiOriginTrial` API to the list of recognised APIs.
- Updates `extension-apis.json` with the latest data from the
  `chrome-types` package.

Updating recognised extension APIs still requires access to a
non-existent storage bucket, so this does not fully fix the process.

* Fix linter issue

api-samples/identity/manifest.json

@@ -9,8 +9,6 @@
   },
   "permissions": ["identity", "identity.email"],
   "oauth2": {
-    // client_id below is specific to the application key. Follow the
-    // documentation to obtain one for your app.
     "client_id": "497291774654.apps.googleusercontent.com",
     "scopes": ["https://www.googleapis.com/auth/userinfo.profile"]
   }