Daily News (New York) October 24, 1999, Sunday ARNOLD TALKS TOUGH TO THE GOP BYLINE: BY GEORGE RUSH AND JOANNA MOLLOY WITH MARCUS BARAM and MARC S MALKIN Arnold Schwarzenegger is breaking ranks with his fellow Republicans. The action star is still embarrassed by how the GOP handled President Clinton's affair with Monica Lewinsky, which he says was nothing more than a "human failure." "I was ashamed to call myself a Republican during that period," he says in November's George magazine. "Instead of devoting all this energy and all these hearings to how we're going to solve the problems of...