Add range option for download requests

[ajroetker]

This commit adds the option to pass range headers into the download requests so that one may satisfy the datafusion ObjectReader interface with this library that requires a chunked reader option.

I'm working on making a GCS version of the S3 datafusion https://github.com/datafusion-contrib/datafusion-objectstore-s3 adapter and using cloud-storage-rs for that.

Mostly a weekend warrior with rust so let me know if this would be sane or if I could do something to improve this!

[ajroetker]

For reference the gcs adapter I'm working on is here https://github.com/ajroetker/datafusion-objectstore-gcs

[ajroetker]

@ThouCheese not sure if I need to ping you or anything for this :)