By Sumit Khanna and Rupam Jain AHMEDABAD, India (Reuters) – India has launched an investigation into how 303 Indians ended up on a chartered flight that was grounded in France last week because of suspected human trafficking, authorities in the western Indian state of Gujarat said on Wednesday. Tipped off by an anonymous informant, French authorities on Friday prevented the plane from flying to its listed destination of Nicaragua from a refuelling stopover at Vatry airport in northeastern France. It had taken off from the United Arab Emirates (UAE) with 11 unaccompanied minors among the passen…