Support Running Inference Over a Tile List Based on Vector Input

It would be useful to have the ability to run inferences over a list of tiles, instead of all tiles in a bbox. The list of tiles would be
based on a vector geometry that a user uploads? to ml-enabler

- we could be flexible with the vector geometry type we accept and use `ogr2ogr` to convert to `geojson` since that's ideal for use with postgis

- then we could automatically generate tiles from the geojson in the predition_tiles table

cc @ingalls