Show warnings in Pipeline Editor
Our CI Lint tool shows a few warnings (which we intend to expand when we have the chance). I think these warnings are very useful, especially when we have more of them, to let people know best practices, or how to avoid possible bad configurations.
Originally discussed in: #238388 (comment 551925175)
We should make the pipeline editor show these warnings, either in the main page, or in the Lint tab.
For example, from the CI Lint tool: