Cynthia Littleton Business EditorIf they’d waited even one more week, the HA Comedy Festival would have been another casualty of coronavirus.Producers of the three-day event held in San Antonio, Texas in late February, have been counting their blessings as they put the finishing touches on an hourlong special derived that premieres today on HBO Max.“HA Comedy Festival: The Art of Comedy” features short sets from comedians Gina Brillon, David del Rosario, Carmen Lynch, Monique Marvez, Pedro