feat: Implement GetObjectRange for all storage providers

[benclive]

What this PR does / why we need it:

• For RF-1 project, adding GetObjectRange API to all the object stores.
• This just uses whatever the native feature is (normally HTTP Range header) to fetch part of the object instead of the whole thing.
• HTTP range headers are fully inclusive compared to Go's slices, for example, so thats a small gotcha.
• I don't know if we want to track the fetch metrics under a different name or not, because they're all parameters to the regular GetObject call in each case.

[cyriltovena]

LGTM