Delete access logs after specified time

[rgraber]

Checklist

1. If you've added code that should be tested, add tests
2. If you've changed APIs, update (or create!) the documentation
3. Ensure the tests pass
4. Make sure that your code lints and that you've followed our coding style
5. Write a title and, if necessary, a description of your work suitable for publishing in our release notes
6. Mention any related issues in this repository (as #ISSUE) and in other repositories (as kobotoolbox/other#ISSUE)
7. Open an issue in the docs if there are UI/UX changes

Description

Creates a background task to delete access logs after a number of days, specified in the Constance configuration as ACCESS_LOG_LIFESPAN.

Notes

Creates a spawning task that collects all ids of non-submission group access logs over ACCESS_LOG_LIFESPAN days old, and all submission groups where the latest date is more than ACCESS_LOG_LIFESPAN days ago, and enqueues a subtask per batch of 1000. The subtask then fetches the audit logs and deletes the batch.
The batching is to prevent tying up the database (or the celery queue) for too long, and so if something goes wrong with one batch of deletions the rest can continue.
The more-itertools library provides an easier way of breaking up the list of logs to be deleted into equal-sized sublists. It is a well-maintained library with a solid reputation https://github.com/more-itertools/more-itertools. The built-in itertools library actually has this method, but only in python 3.12. If and when we get there, we can remove the new import.

Blocked by #5080.

[rgraber]

Replaced by #5097