MINISERIES PREMIERE: Alan Spencer of Sledge Hammer! fame returns, after a long period of satirical TV dormancy, with another short burst of genre humor poking fun at cop-show conventions and, this time, Tarantino-style action excesses. This one is six half-hour episodes, doled out over two nights, with each night a brisk triple feature. The recognizable stars are the featured villains, opposing crime lords played by Eddie Izzard and Eric Roberts. But the major roles go to Max Williams as the two