Turnstile: require token before joining a multiplayer game (#2572)

When user tries to join either a public or private multiplayer game, the
turnstile callback is triggered, and the turnstile token is passed to
the server when joining a game.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

evan

.github/workflows/deploy.yml

@@ -120,6 +120,7 @@ jobs:
           R2_ACCESS_KEY: ${{ secrets.R2_ACCESS_KEY }}
           R2_BUCKET: ${{ secrets.R2_BUCKET }}
           R2_SECRET_KEY: ${{ secrets.R2_SECRET_KEY }}
+          TURNSTILE_SECRET_KEY: ${{ secrets.TURNSTILE_SECRET_KEY }}
           API_KEY: ${{ secrets.API_KEY }}
           SERVER_HOST_MASTERS: ${{ secrets.SERVER_HOST_MASTERS }}
           SERVER_HOST_FALK1: ${{ secrets.SERVER_HOST_FALK1 }}