Eight Philadelphia high school students were shot and wounded as they waited for a public bus after school on Wednesday, the latest in a spate of shootings that have touched off outrage in the city, the police said.The students, who attend Northeast High School, were shot at about 3 p.m. as they waited at a bus stop near a Dunkin’ Donuts just over a half-mile from the school, Kevin J. Bethel, the Philadelphia police commissioner, said at a news conference.As a bus pulled up to the stop and the students prepared to board, three people got out of a car that was parked nearby and opened…