IN Ramallah, thousands of miles from Paris, Palestinian leaders wait in anxious hope for Yasser Arafat. For almost two weeks, their president has been undergoing medical treatment at the Percy Military Hospital, located on the outskirts of Paris. In life or death, Arafat's fate will determine what steps his countrymen will take. If he dies, one of the nation's most important figures will be—at least according to their Constitution—Rau