Refactor HTTP body consumption

Saketh Pairequested to merge
savvyhex/client-go-deletion_scheduled-77652174:2134-refactor-consumption-of-http-body into main

Summary

Added streaming variants for endpoints that download raw HTTP bodies so callers can stream responses directly to an io.Writer and avoid allocating memory for the entire response.

Key Changes

Added streaming methods that accept an io.Writer for memory-heavy endpoints. Each Stream* method builds the request and calls Client.Do(req, w) directly so the HTTP response body is copied into the previous writer without first buffering it. The only files touched are the ones where raw downloads live.

Related Issue

Closes #2134

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