[charts] Weird behavior when finding closest point in zoomed in scatter chart #18908
Description
The closest point logic seems to be selecting a random point when no points are visible.
Screen.Recording.2025-07-25.at.11.32.14.mov
In this case, we should either show no tooltip (because there are no visible points) or show the tooltip of the closest point (even if invisible). It seems our current logic is the former, so we should keep it.