Configure the sessions redis for staging
What does this MR do?
Part of gitlab-com/gl-infra/production#5962 (closed) in which we preparing to start using a new distinct Redis for Sessions in gstg. This adds the Rails configuration; it depends on chef as the SSOT, so we must use CHEF_CONFIG_UPDATE to pick up any changes made in chef after this is merged.
Author Check-list
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Reviewer Check-list
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Reviewed the diff jobs to confirm changes are as expected -
No changes shown in the diffs not associated with this MR - This may require a rebase or further investigation
Edited by Aleksei Lipniagov