[jak2] a few small graphics fixes (#2424)

- better handling of the `disable-fog` settings for merc, should fix the
spotlights. There's a setting in the merc effect, and also a runtime
flag for the draw-control. I'm not actually sure what reads these, but
the draw-control one is definitely used to disable fog on the
spotlights.
- increase merc draw limit to try to fix the issue about partially drawn
citizens in the city
- remove useless debug prints (it's okay to die in init, and the medium
load buffer size mode is understood now)

common/custom_data/Tfrag3Data.h

@@ -73,7 +73,7 @@ struct MemoryUsageTracker {
   void add(MemoryUsageCategory category, u32 size_bytes) { data[category] += size_bytes; }
 };
 
-constexpr int TFRAG3_VERSION = 30;
+constexpr int TFRAG3_VERSION = 31;
 
 // These vertices should be uploaded to the GPU at load time and don't change
 struct PreloadedVertex {