JERUSALEM (Reuters) -Israel was headed on Wednesday toward its fifth election in less than four years, plunging it deeper into political uncertainty as it grapples with rising living costs amid renewed international efforts to revive a nuclear deal with Iran. Prime Minister Naftali Bennett announced he would not run in the upcoming election but would retain his position as alternate prime minister after his coalition partner Yair Lapid takes over as head of the interim government. “I leave behind a thriving, strong and secure country,” he told reporters on Wednesday. “We proved this year that …