Adding Retries into the Helm http getter, for 502/503 status codes. #12976
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What this PR does / why we need it:
Currently when you get a 502, or 503 on a http get it fails immediately. This PR adds basic retries to it, since 502/503 are usually transient issues. It has a small timeout window so it shouldn't be an inconvenience time wise if the servers stay down longer.
Special notes for your reviewer:
A test not related to my code seems to be panic-ing locally.
If applicable: