Refactor and add new environment functionality to CI yaml reference
What does this MR do?
Add new environment
functionality to the yaml reference.
What are the relevant issue numbers?
Part of https://gitlab.com/gitlab-org/gitlab-ce/issues/23484
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Add new environment
functionality to the yaml reference.
Part of https://gitlab.com/gitlab-org/gitlab-ce/issues/23484