dev: use admin Harbor credentials instead of robot account
Use the admin user's credentials instead of the robot account in local deployments as certain API calls need full permissions, which the robot account doesn't have.
Bug: T352770
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.
Use the admin user's credentials instead of the robot account in local deployments as certain API calls need full permissions, which the robot account doesn't have.
Bug: T352770