A former ally of Prime Minister Benjamin Netanyahu on Sunday said he would seek to form a coalition government with the Israeli leader’s opponents, taking a major step toward ending the rule of the longtime premier. The dramatic announcement by Naftali Bennett, leader of the small Yamina party, set the stage for a series of steps that could push Netanyahu and his dominant Likud party into the opposition in the coming week. While Bennett and his new partners, headed by opposition leader Yair Lapid, still face some obstacles, the sides appeared to be serious about reaching a deal and ending the deadlock that has plunged the country into four elections in the past two years. “It’s my intention to do my utmost in order to form a national unity government along with my friend Yair Lapid, so that, God willing, together we can save the country from a tailspin and return …