Split start and wait into 2 steps

Author: MattSkala

.github/actions/setup_test_action/action.yml

@@ -26,9 +26,11 @@ runs:
       shell: bash
       run: npm install -g firebase-tools wait-on
     - name: Start Firebase emulator
+      shell: bash
+      run: firebase emulators:start --config=./test/firebase.json &
+    - name: Wait for Firebase emulator to start
       shell: bash
       run: |
-        firebase emulators:start --config=./test/firebase.json &
         echo "Waiting for Firebase Auth emulator to start..."
         wait-on http://127.0.0.1:9099
         echo "Waiting for Firebase Firestore emulator to start..."