HANOI, March 31 : Vingroup has told Vietnam's government it wants to ditch a plan to build the country's largest LNG-fired power plant and embark on a renewable energy project instead, as the Iran war has boosted the risk of the fuel becoming too expensive, a document showed. The March 25 document, which is being reported by Reuters for the first time, was sent about two weeks after U.S. energy equipment giant GE Vernova announced it had been selected to supply gas turbines and generators for