[MM-29723] Added websocket event constant for updating the payment status for cloud (#15988)

model/websocket_message.go

@@ -68,6 +68,7 @@ const (
 	WEBSOCKET_EVENT_SIDEBAR_CATEGORY_ORDER_UPDATED           = "sidebar_category_order_updated"
 	WEBSOCKET_WARN_METRIC_STATUS_RECEIVED                    = "warn_metric_status_received"
 	WEBSOCKET_WARN_METRIC_STATUS_REMOVED                     = "warn_metric_status_removed"
+	WEBSOCKET_EVENT_CLOUD_PAYMENT_STATUS_UPDATED             = "cloud_payment_status_updated"
 )
 
 type WebSocketMessage interface {