Jem Aswad Senior Music EditorThe ongoing COVID-19 pandemic and a blizzard that dropped nearly a foot of snow on New York certainly could have put a major damper on the War on Drugs’ biggest-ever concert in the five boroughs — but despite those obstacles, an impressive crowd witnessed the group’s debut at Madison Square Garden on Saturday night.Indeed, the Philadelphia band’s 18-song, 130-minute performance in many ways offered a refreshing snapshot of the state of arena rock circa 2022. Aside from drummer Charlie Hall’s snazzy patterned shit and windblown hair and a tasteful light show, there was little, if any, flash.