By Michel Rose PARIS (Reuters) – French Prime Minister Elisabeth Borne resigned on Monday, as President Emmanuel Macron seeks to give a new impetus to his second mandate ahead of European parliament elections and the Paris Olympics this summer. Macron did not immediately name a successor for Borne, who will stay on as a caretaker along with the rest of the government until a new one is formed, the presidential palace said in a carefully choreographed move. The change was made after a year marred by political crises triggered by contested reforms of the country’s pension system and immigration …