In productions of Mozart’s opera “Don Giovanni,” the despicable title character may receive his just punishment in any number of ways, usually through fire and brimstone. In Cincinnati Opera’s production unveiled June 13, Grim Reaper-like figures and winged “angels of death” surrounded Giovanni and swept him away into Hell. The scene was positively bone-chilling, and one of the most inventive I’ve ever seen. Cincinnati Opera launched its 104th season with “Don Giovanni,” a new…