jenkins-rel: disable jenkins service on secondary targets
So we don't need to manually perform this step anymore
Bug: T343447
How to register an account on GitLab. To prevent spam, new accounts are locked until approved by an admin or the approver bot. You can also file an unlock request to expedite access.
Support: mw:GitLab, how to host a project on GitLab, #wikimedia-gitlab on libera.chat, #GitLab on Phabricator.
So we don't need to manually perform this step anymore
Bug: T343447