Highlight incremental logging

What does this MR do?

I recently had a customer whose CI/CD logs were not consistently available. We found this to be caused by a missing configuration of NFS for /var/opt/gitlab/gitlab-ci/builds/ as an NFS mount between GitLab Rails and Sidekiq nodes. As our documentation does not include any instructions for this configuration, but rather points to incremental logging.

In this MR, I propose we create a new section to highlight the enablement of incremental logging to ensure that this step is not overlooked.

Related issues

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