dev(narugo): add resume for ranged headers of http_get function

[narugo1992]

for issue #2761

[HuggingFaceDocBuilderDev]

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[hanouticelina]

Hi @narugo1992, thanks a lot for your contribution!
I left some comments and I took the initiative to push to your branch an improvement of the http get tests to use pytest instead of unittest. It's a bit out of scope of this PR, but it consolidates the tests you added.

[hanouticelina]

Thanks again @narugo1992 for your contribution 🤗
I pushed a simplification of the _adjust_range_header, everything looks good now! Let's wait for a final review from @Wauplin and then we should be good to merge.

[Wauplin]

Thanks for the ping. Maybe I'm wrong but I feel we should be more conservative on the use cases we want to support
i.e., better to raise explicit errors for now on corner cases and add them later if we think they are useful