ATHENS, Ga. — NC State coach Elliott Avent made a promise to himself more than two decades ago: He’d only go to the Men’s College World Series with 27 players in tow and a game to play at Charles Schwab Field. He taught one coaching clinic there during his tenure at New Mexico State, but was determined to go to the heartland with his squad playing in the event. Since then, Avent has taken two NC State teams to Omaha — and now he’ll have another trip to make this weekend. The Wolfpack, led by graduate outfielder Eli Serrano III’s all-around game, beat Georgia 8-5 in Game 3 of the Athens Super R…