Notification for first pipeline run after auto devops is automatically enabled
### Problem to solve Once auto devops is enabled by default, some users may be unaware of this fact. Once they receive a failure email for a CI pipeline, they may be confused as to why something they never configured failed and was then disabled. ### Further details An example flow (current state) 1. GitLab is released, with auto devops enabled by default 2. user pushes a commit 3. user received a CI failure message ### Proposal When auto devops is enabled by default, send notification when: 1. The pipeline was successful * inform user auto devops was enabled * short blurb about what is auto devops * link to documentation * link to pipeline * small blurb about k8s? (benefits of adding a cluster if not present) 2. The pipeline failed and auto devops was disabled. * inform user auto devops was enabled * short blurb about what is auto devops * link to documentation * inform user the pipeline ran and it failed * link to pipeline * inform user auto devops has been disabled Who to notify? * user to triggered the pipeline run * owners? ### What does success look like, and how can we measure that? (If no way to measure success, link to an issue that will implement a way to measure this) ### Links / references
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