Store pipeline job logs in object storage (S3)
<!--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=17490) </details> <!--IssueSummary end--> ### Description Pipeline job logs (née build logs) grow unbounded and after a while, particular for Java logs, become unmanageable for local or NFS storage. We should use CarrerWave so people can point to external storage (e.g. S3). ### Proposal ### Links / references * Parent issue: https://gitlab.com/gitlab-org/gitlab-ce/issues/26897 * Related: https://gitlab.com/gitlab-org/gitlab-ce/issues/29203
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