[#2902] Add celery tasks to prune outgoing-request-logs #8177

Job	Run time
Build and check documentation	1m 51s
End-to-end tests, chromium	4m 5s
Check that documentation for configuration steps is up-to-date	1m 26s
End-to-end tests, firefox	4m 23s
End-to-end tests, webkit	5m 16s
Run the Django test suite (main)	20m 10s
End-to-end tests, msedge	5m 35s
Run the Django test suite (elastic)	5m 48s
Run the Django test suite (openklant)	2m 46s
Upload coverage information to codecov	24s
Build (and push) Docker image	1m 45s
	53m 29s

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