TCM’s prime-time schedule tonight presents two stunningly photographed and imaginatively framed and sculpted movies from the 1970s. First up: 1972’s Cabaret, Bob Fosse’s tour de force of choreography and film direction, which handed Liza Minnelli the role of a lifetime. Which she, in turn, devoured. Joel Grey, as the emcee, is fabulous as well – though on Broadway in two revivals, Alan Cumming has been spectacular enough to claim ownership of the role. No one’s real