GameSettings: clean up texture filtering settings

`MaxAnisotropy = 0` is no longer the safest setting because it forces 1x
even if the game asks for more.

`ForceFiltering` was replaced by `ForceTextureFiltering` in
afe9d5b098. The one remaining occurrence
was merged later.

`ForceTextureFiltering` is an int option and shouldn't be set to False.

Just Dance 3, Just Dance: Best of, and Just Dance: Greatest Hits look
fine on AMD GPUs without manual texture sampling. On Nvidia GPUs they
have a single stripe that I think doesn't warrant forcing manual texture
sampling for everyone.

The NES games I tried worked fine with anisotropic filtering, it just
doesn't do anything.

Various games don't actually have any issue with anisotropic filtering
as long as it's not forced. The only game I could find that actually
requires the default aniso setting is Spider-Man: Shattered Dimensions.

Boogie SuperStar works fine with any texture filtering setting.

Data/Sys/GameSettings/RGQ.ini

@@ -10,5 +10,5 @@
 # Add action replay cheats here.
 
 [Video_Enhancements]
-ForceTextureFiltering = False
+ForceTextureFiltering = 0