🐛 Scrolling isn't smooth on DatePicker & TimePicker

**Describe the bug**
When scrolling in the DatePicker and the TimePicker the scroll should be smooth. It isn't now.
Half the time, when scrolling on the day column by example, it doesn't change the day on the first scrolling tick, but one the second one.

**To Reproduce**
Steps to reproduce the behavior:
1. Open Example App
2. Click on 'Form'
3. Open the DatePicker or the TimePicker
4. Slowly scroll down one column (day, hour, day, ...)
5. See error

**Expected behavior**
We expect the scroll to be smooth here to match the Win UI 3 DatePicker and TimePicker behaviour. Should be like this:

**Screenshots**

**Additional context**
Nothing

Start by reproducing the issue in the Example App through Form, then inspect the DatePicker and TimePicker scrolling behavior. Verify each slow scroll changes the selected column on the first tick and matches the smooth WinUI 3 behavior shown in the references.

Written by the indexing model from the issue text.