Always keep an in-memory history of all commands in redis-cli (#12862)
redis-cli avoids saving sensitive commands in it's history (doesn't persist them to the history file). this means that if you had a typo and you wanna re-run the command, you can't easily do that. This PR changes that to keep an in-memory history of all the redacted commands, and just not persist them to disk. This way we would be able to press the up arrow and re-try the command freely, and it'll just not survive a redis-cli restart.
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