Datagrid with frozen columns: Adorner of moving columns visual issue

### Description

I have a datagrid with one frozen column. One other/moving column has an adorner (red rectangle on the border of the cell + triangle) shown (validation error). When I scroll horizontally the column moves behind the frozen column, but the adorner does not.


I know the nature of adorners and how they are placed in the visual tree. So I know this isn't an easy thing to solve. But it is a quite obvious bug for the user.

### Reproduction Steps

1. Create a datagrid with 4 columns.
2. The IsFrozen=true for the 1st one.
3. Add an adorner to the 3rd one.
4. Scroll so the 3rd column moves behind the frozen 1st one.

### Expected behavior

The adorner should also move behind the frozen columns as well.

Alternative: The adorner should get invisible once the column enters behind the the frozen column, not just when its fully behind it.

### Actual behavior

The adorner moves over the frozen column

### Regression?

This is the case since ever afaik

### Known Workarounds

No known workarounds. But I'm happy if someone could tell me one.

### Impact

_No response_

### Configuration

_No response_

### Other information

_No response_