ST. LOUIS — Well, the Cardinals and Paul Goldschmidt finally got that home run they were seeking Friday night after eight dry games. A lot of good it did. The singles machine that has been the Cardinals lately churned out only three singles to go with a double by Nolan Arenado. That was the extent of the Cardinals’ attack in a 6-2 loss to the light-hitting Diamondbacks before a paid house of 40,753 at Busch Stadium. Arizona had been so punchless entering the game that it had by far the lowest team batting average in the majors at .178. This renders it almost inexcusable that the Cardinals walk…