Resource leak: HTTP response bodies not closed on redirects

[jaffarkeikei]

Location: pkg/debuginfo/debuginfod.go:401-413

When handleResponse follows redirects, old response bodies aren't closed before making new requests:

case 3:
    resp, err = c.doRequest(ctx, resp.Header.Get("Location"))  // ❌ Old resp.Body leaked
    if err != nil {
        return nil, fmt.Errorf("request failed: %w", err)
    }
    continue

Fix:

case 3:
    redirectURL := resp.Header.Get("Location")
    resp.Body.Close()  // ✅ Close before redirect
    resp, err = c.doRequest(ctx, redirectURL)
    if err != nil {
        return nil, fmt.Errorf("request failed: %w", err)
    }
    continue

Impact: Leaks file descriptors and memory when debuginfod servers return redirects.