[MM-40638] Type all of the websocket event names as a new type WebsocketEventType (#25454)

Co-authored-by: Sudheer Tripathi <sudheer@clearglass.com>
Co-authored-by: Sudheer Tripathi <31629433+sudheer121@users.noreply.github.com>
Co-authored-by: Sudheer Tripathi <tripathisudheer604@gmail.com>

server/channels/app/platform/websocket_router.go

@@ -36,7 +36,7 @@ func (wr *WebSocketRouter) ServeWebSocket(conn *WebConn, r *model.WebSocketReque
 		return
 	}
 
-	if r.Action == model.WebsocketAuthenticationChallenge {
+	if r.Action == string(model.WebsocketAuthenticationChallenge) {
 		if conn.GetSessionToken() != "" {
 			return
 		}