Upgrade to GeoTrellis 3.0

[notthatbreezy]

Problem description

There is a new GeoTrellis release that changes some library functionality, moves things that were in contrib to core, and should allow us to hopefully remove any dependency on spark(!!).

The goal of this upgrade should be to use new functionality makes sense, but hold off on larger architectural changes for their own issues (e.g. probably shouldn't switch to using RasterSourceF at this point) but I think it should include the removal of our custom BacksplashRasterSource for the default GeoTiffRasterSource that allows passing in an optional GeoTiff (which we can do with our GeoTiffInfo change).

Expected Behavior or Output

Upgraded GeoTrellis in RF

[jisantuc]

As we stay behind on GT before Cats 2.0, it gets harder and harder to use typelevel ecosystem libs, since the versions we're stuck on are behind the versions that are documented (specifically with STTP). As we use the RF API and artifacts to support client work, that makes it harder and harder over time efficiently to re-use our own code. We should do this soon.