Investigate a workaround for grass in build

@Wright I looked into the issue where grass is broken when you create it at runtime (white billboards). I'm on URP 14/Unity 2022.2 btw.What's happening is that Unity renders the grass with the "Universal Render Pipeline/Lit" instead of the "Hidden/TerrainEngine/Details/UniversalPipeline/WavingDoublePass" shader. It also renders them before the terrain (wrong pass).On top of that, "GraphicsSettings.currentRenderPipeline.terrainDetailGrassShader" is null in builds.I don't know if you can add this to your bug report, but I'm not optimistic, because apparently Unity has decided that they won't fix it.I'm impressed by this response. I guess Unity won't support procedural terrain generation anymore. Anyway, I made my own workaround. If you don't want me to post your source code (and the changes I made to it) here in the open, you can send me a private message and I can show you how I fixed it there.