[DataPrep] Return more metadata for masks

[jejjohnson]

It might be helpful to include meta information like the crs and the transform for the Viz team.

See file src/data/create_gt.py.

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Original Comment by @Lkruitwagen

for downstream tasks if would be help if the crs and transform were also (optionally?) returned. We need these to be able to rasterize the ndarray to COG