ProgressBar strange animation when value decreases

### Describe the bug

The animation of the ProgressBar when its value decrease is very strange. It seems like the bar itself is shrinking not on its left edge, but somewhere in the middle, while translating.

### Why is this important?

It does not look natural and polished.

### Steps to reproduce the bug

Go to winui 3 gallery >> ProgressBar page. Set the value to 100, then set it to 50.

### Actual behavior

_No response_

### Expected behavior

The left edge should be fixed during a decrease animation.

### Screenshots

_No response_

### NuGet package version

2.4.0

### Windows version

Windows 10 (1809): Build 17763

### Additional context

_No response_

Reproduce the issue in the WinUI 3 Gallery on the ProgressBar page by setting the value to 100 and then 50. Trace the ProgressBar animation and verify that the left edge remains fixed while the value decreases, with the behavior checked on the reported WinUI package and Windows version.

Written by the indexing model from the issue text.