Define a proper icon for cherry-pick system notes
With !22209 (merged) we developed #36130 (closed) to track MR deployments when the commit is cherry-picked.
Because the feature is behind a feature flag we selected an icon from those already available to us, but before we remove the FF we should define the final icon.
Here is a screenshot of the current one. It's the link
icon, third from the top of the timeline.