Maybe it’s time to start thinking about the films that Will Ferrell and Adam McKay made together as an epic run of low-rent masterpieces, sort of like a legendary band that put out a string of five or six killer albums before breaking up. At least that’s what I found myself thinking when revisiting this; it was probably only my second viewing ever and I was a bit astonished by how truly great it is. As with “Talladega Nights,” both…