PARIS — France’s deepening political crisis could wreak collateral damage on the troubled fighter jet Paris is supposed to build with Germany and Spain. “The situation is very unfavorable to the French camp and could contribute to the failure of the Future Combat Air System by the end of the year. Without a minister, what credibility does France have?” said a French industry official who, like others in this story, was granted anonymity to speak candidly about a sensitive topic. On Monday