Together with https://github.com/edx/configuration/pull/5710 (merged) , this config update allows the LabXchange app to make its "GET pathway" operation use the LMS instead of Studio, so that normal read-only views of the content don't depend on the backend making Studio API calls. Pathway edits/deletes still use Studio as before.
This fixes the situation where some read-only operations on the LabXchange production site stopped working when Studio was unavailable. After this change, Studio being unavailable will only disrupt LabXchange write operations (content authoring).
The setting in this PR is already applied in `studio.yml`; this just copies it to `lms.yml`