By Michel Rose and Ingrid Melander PARIS (Reuters) -French President Emmanuel Macron said on Thursday he would increase the retirement age, cut taxes and further loosen labour market rules if he wins a second term in next month’s election, seeking a mandate to press on with pro-business reforms. Opinion polls show Macron is likely to win the first round of the election on April 10 and beat any opponent in a run-off on April 24. His longstanding lead has grown in recent weeks, with voters approving of his diplomatic efforts over the Ukraine war. “We are at a tipping point where we can make a re…