Indeterminate progress bar used as BitmapCacheBrush target do not animate

### Description

When using a `BitmapCacheBrush` whose `Target` is a `ProgressBar` with `Indeterminate="True"`, the rendered control does not animate.

### Reproduction Steps

Create a new WPF project that targets either .NET 7 (`net7.0-windows`) or .NET 8 (`net8.0-windows`).

Add the following code to `MainWindow.xaml`:

```xaml

```

Run the application.

### Expected behavior

An animated, indeterminate progress bar should be rendered. This is the behavior on .NET 6.


### Actual behavior

A static, completely filled progress bar is rendered:


### Regression?

This is a regression; it used to work in .NET 6.

### Known Workarounds

Instead of using a `BitmapCacheBrush`, you can use a `VisualBrush` and assign its `Visual` property to the progress bar (instead of the `BitmapCacheBrush.Target` property). This fixes the UI, but obviously is less ideal than using a `BitmapCacheBrush`.

### Impact

My application uses many progress bars that we synchronize and reduce their overhead with by using the bitmap cache. This bug breaks all of those bars.

### Configuration

_No response_

### Other information

_No response_