Investigate increasing the frequency of export file cleanup
<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=235147) </details> <!--IssueSummary end--> ## Problem Investigation into https://gitlab.com/gitlab-org/gitlab/-/issues/227700 showed that we keep export files around for at least 24 hours. This takes up a lot of space (see #2 https://gitlab.com/groups/gitlab-org/-/epics/3671#types-of-upload-storage-and-total-sizes) and ideally we'd try to reduce this footprint. We have at least a couple of options: 1. Decrease the amount of time that we keep export files available to download 2. Delete these files as soon as they have been downloaded the first time ## Goal Determine if we can increase the frequency that we remove the export files generated for download.
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