This is moving the cleanup script to delete old log files, from being a
cron job, to being a scheduled task in the backend server. Why?
1. We want to support running Appsmith with readonly root, which is a
request from security teams at enterprise companies.
2. Cron doesn't play nice. It wants to save a `.pid` file under
`/var/run`, so it fails to start when running with readonly root. This
is not configurable.
3. Since our use of cron is minimal only, we're moving away from it,
especially since the backend server is already capable of running
scheduled tasks.
4. This moves one job, there's still another. Based on experience from
this, we'll work on the other.
Another advantage to doing this is that since this job is now running in
the backend server, which has access to MongoDB and Redis, we can
coordinate when running as a cluster, that only _one_ backend is running
the clean up job. This is for much later though.
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Co-authored-by: Nidhi <nidhi@appsmith.com>
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