Independent: They probably won’t get much sympathy from their hard-pressed fans, but America’s stars of stage and screen are being forced to give up one of the traditional benefits of their celebrity status: private jets. The soaring price of aviation fuel, which is now twice the cost of a year ago, is adding tens of thousands of dollars to the cost of a typical flight, prompting members of Hollywood’s élite to think the unthinkable and ground their personal Gulfstreams. Last week, the …