Use Remote-User instead of Persistent-id
Since using the persistent-id is causing an issue on the site, change it to use Remote-User which has the same value with our hand-made REMOTE_USER
Gitlab has been upgraded from 17.11.7 to 18.2.8. See the following release notes: - Gitlab 18.0 - Gitlab 18.1 - Gitlab 18.2
Since using the persistent-id is causing an issue on the site, change it to use Remote-User which has the same value with our hand-made REMOTE_USER