[D11] fix for SLODs being pink in hdrp. Added a shadergraph shader which is uses the LitMaster plus an extra node which applies the dithered alpha clip. It's a bit of cheat because you can't have custom function nodes which don't connect to something, so I'm just passing the model's alpha through my function, and doing the dither clip as a "side effect" of the function, but I don't see why it won't be robust. Tweaked the other inputs to LitMaster to try to make the slod models look similar to before, this could do with more artist tweaking, and generally the (cross)fade could be more polished. + a water compile fix that I missed from a commit yesterday + a foliageASE instancing fix I missed too