Describe the bug
If you have a bar series with a different type of series (like Line) on the same chart, when hovering the bar the highlight that overlays the bar is also on top of the Line chart.

To Reproduce
Steps to reproduce the behavior:

1. Create a chart with at least 1 bar series and one other type of series or go here
2. Hover one of the bars that also has a point overlapping it
3. See error

Expected behavior
I go back and forth on this one whether it's expected or not. I first noticed it in this screenshot:

Then I visited the theme section in the docs and this visual makes sense to me:

Because the bar is completely hidden so it's nice to see an outline. However, I can't decide how necessary that is and/or if the main part that's bothering me is that in the first screenshot, the dot has the "hover ring" around it that's being obscured by this overlay.

Since my cursor is on a dot, I would think my main focus is on that point not the bar but that point is being obscured. Maybe that is the fix. To keep the hover/focus rings above the charts below it.

Version (please complete the following information):

• Elastic Charts: 9.0.4