It may now be hard to imagine, but in 1970, Donald Sutherland, who died Thursday at 88, was the coolest movie star on the planet. The moment I saw him in “MASH,” I knew he was the person I wanted to be, the same way that I wanted to be Mick Jagger or Steve McQueen. In 1970, Pacino and De Niro hadn’t happened yet. You could say that Robert Redford and Paul Newman, in “Butch Cassidy…