What would you like to be added:
I'd like to propose that we modify our existing HA behavior where we all Kueue replicas in a multi-replica setup emit logs and metrics. A solution to that would be to stop emitting logs and metrics from follower replicas or to have some kind of field in the logs and metrics to know whether they come from the leader or the followers.

Why is this needed:
Because we don't attach any information to the logs whether they were emitted by the leader or followers it gets unnecessarily noisy when browsing or searching through logs.

Completion requirements:

This enhancement requires the following artifacts:

• Design doc
• API change
• Docs update

The artifacts should be linked in subsequent comments.