Improve ingame moderation for admins (#3678)

## Description:

Players with the `admin` flare can now kick players from any game
(including public lobbies), not just the lobby creator in private
lobbies.

## 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:

w.o.n

src/server/Worker.ts

@@ -401,7 +401,6 @@ export async function startWorker() {
           return;
         }
 
-        let roles: string[] | undefined;
         let flares: string[] | undefined;
 
         const allowedFlares = config.allowedFlares();
@@ -422,7 +421,6 @@ export async function startWorker() {
             ws.close(1002, "Unauthorized: user me fetch failed");
             return;
           }
-          roles = result.response.player.roles;
           flares = result.response.player.flares;
 
           if (allowedFlares !== undefined) {
@@ -484,7 +482,7 @@ export async function startWorker() {
           generateID(),
           persistentId,
           claims,
-          roles,
+          claims?.role ?? null,
           flares,
           ip,
           censoredUsername,