[E2E CI] Update firebase-tools to v13.0.2 (#7883)

Previously we ran into an issue where we couldn't use the latest firebase-tools CLI version (v13+) due to an error attempting to deploy the E2E cloud function.

The error was due to a new requirement of the CLI that `firebase.json` requires a `functions` configuration. This change adds that configuration and pins the firebase CLI version to 13.0.2.

.github/workflows/e2e-test.yml

@@ -60,7 +60,7 @@ jobs:
           pushd functions
           npm install
           popd
-          npx firebase-tools@12.9.1 deploy --only functions:callTest --project jscore-sandbox-141b5 --token $FIREBASE_CLI_TOKEN
+          npx firebase-tools@13.0.2 deploy --only functions:callTest --project jscore-sandbox-141b5 --token $FIREBASE_CLI_TOKEN
         working-directory: ./config
         env:
           FIREBASE_CLI_TOKEN: ${{ secrets.FIREBASE_CLI_TOKEN }}

config/firebase.json

@@ -5,5 +5,8 @@
   "firestore": {
     "rules": "firestore.rules",
     "indexes": "firestore.indexes.json"
+  },
+  "functions": {
+    "runtime": "nodejs18"
   }
 }