Clarenceville High School students Harry Zhen and KellyWilson don’t like that they won’t be able to leave campus for lunch this school year, but they like the new$1.5 million cafeteria they’ll be eating in. “It’s amazing,” said Zhen, a senior, of the 6,000-square foot cafeteria with bigscreen televisions and wifi access built on the school’s former courtyard. “This is very …