build: Setup GitLab CI
When this is merged it, it will run the pipeline in such a way that it will publish a new function-orchestrator image, so we should wait to merge it until we are ready to cut over.
Bug: T334397
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.
When this is merged it, it will run the pipeline in such a way that it will publish a new function-orchestrator image, so we should wait to merge it until we are ready to cut over.
Bug: T334397