For a given SyncTarget, how can I determine which workspaces have content going to it?

[ncdc]

Split out from #1909

@cmoulliard could you please continue the conversation for this topic here? What use cases are you trying to solve? Thanks!

[cmoulliard]

As an Ops engineer operating on a kcp+k8s platform, I will be interested to figure out easily which workspaces are sync to a k8s cluster in order to report problems to the team/user working top of the workspace where error(s) have been discovered