Increase Sandstone Generation

The recent changes to remove hilly biome types has inadvertently made sandstone much harder to obtain in large quantities. Desert Hills used to generate all sandstone down to sea level, but now stone is generating there instead.

I would suggest large sandstone blobs to generate in deserts, similar to the large calcite blobs that generate in stony peaks. Red sandstone could also generate like this in badlands, making red sandstone more accessible for survival players.