use collection inputs from dataset attrs

catalog/LOCA_future/collection.json

catalog/LOCA_historical/collection.json

catalog/catalog.json

...00_rcp26_r6i1p1_I35Land_20060101-20991231/collection.json

catalog/iclus_hc/collection.json

...ows/archive/LOCA_future_create_collection_from_zarr.ipynb

...archive/LOCA_historical_create_collection_from_zarr.ipynb

workflows/archive/cprep_create_collection_from_zarr.ipynb

...ows/archive/dcp_conus_t_create_collection_from_zarr.ipynb

workflows/archive/iclus_hc_create_collection_from_zarr.ipynb

workflows/stac_helpers.py