Use Gitlab::HTTP in download method
What does this MR do and why?
This change uses Gitlab::HTTP library to do artifact download rather than IO in order to skip commonly undesirable URLs (e.g. localhost).
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this MR.
Related to #328484