CLI should retry when it encounters a 502 error

[rohan-at-sentry]

Discussed in codecov/feedback#88

^{Originally posted by drazisil-codecov July 19, 2023}
When the CLI encounters a 502 error

<h2>The server encountered a temporary error and could not complete your request.<p>Please try again in 30 seconds.</h2>

It should retry.

[eliatcodecov]

my guess is we need to duplicate the retry logic found in codecov/uploader, where we will retry the POST two or three times before giving up.