ORLANDO, Fla. — Orlando International Airport will receive $50 million in grant funds from the Federal Aviation Administration as part of airport assistance flowing out of last year’s infrastructure act. The announcement Thursday put Orlando’s airport among the top winners of FAA grants totaling $1 billion for 85 airports. The $50 million is to help complete Orlando International’s south terminal, which is scheduled to open in September. “In considering the growth we’ve seen in this community and this airport, they recognized the grant was much needed,” said Kevin Thibault, chief executive off…