MCALLEN, Texas — A day after Elon Musk’s plane flew to Lafayette, a plane known to be used often by Gov. Jeff Landry travelled on Friday morning to McAllen, Texas, about 65 miles west of SpaceX’s Starbase launch site, The Advocate reported.The flight is the latest indication that SpaceX may be exploring plans to build a new launch site in South Louisiana. It was not immediately clear whether the governor was on board or what other passengers mig…