PARIS — Marine Le Pen desperately wants to run in the next French presidential election, and she’ll throw former allies and longtime foes under the bus if need be. The leading French far-right presidential candidate took the stand at her appeal trial for the first time on Tuesday, disputing allegations that she embezzled funds from the European Parliament by shifting the blame onto the Strasbourg-based institution’s alleged lack of due diligence, and faulting former MEPs who she said hold a