Ensure bot doesn't indefinitely hang on an exception in on_ready #6202
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Description of the changes
As evidenced by the past (#2677, #3663, or, more recently, #6124), we sometimes introduce bugs into this code area, resulting in the bot hanging indefinitely, showing up as online even though it can't be interacted with. This PR aims to properly shut down the bot with a non-zero exit code in such cases.
One unrelated change here is to
fetch_latest_red_version_info()
no longer being wrapped with suppress - this is actually already handled by the function itself, in which case it returns(None, None)
tuple.Have the changes in this PR been tested?
Yes