TokenizingTextBox in the Grid

### Describe the bug
An error occurred while placing TokenizingTextBox in the Grid
at WinRT.ExceptionHelpers.g__Throw|39_0(Int32 hr)
at Microsoft.UI.Xaml.FrameworkElement.MeasureOverride(Size availableSize)
at Microsoft.UI.Xaml.FrameworkElement.Microsoft.UI.Xaml.IFrameworkElementOverrides.MeasureOverride(Size availableSize)
at ABI.Microsoft.UI.Xaml.IFrameworkElementOverrides.Do_Abi_MeasureOverride_0(IntPtr thisPtr, Size availableSize, Size* result)
``` XAML

```
### Steps to reproduce

```text
Reference package:
CommunityToolkit.WinUI.Controls.TokenizingTextBox - v8.0.240109
[Example](https://github.com/MateralCMX/TokenizingTextBoxBugDemo)
```

### Expected behavior

A Grid with two columns, with a TokenizingTextBox control placed in the first column and a red square in the second column.

### Screenshots

_No response_

### Code Platform

- [ ] UWP
- [X] WinAppSDK / WinUI 3
- [ ] Web Assembly (WASM)
- [ ] Android
- [ ] iOS
- [ ] MacOS
- [ ] Linux / GTK

### Windows Build Number

- [ ] Windows 10 1809 (Build 17763)
- [ ] Windows 10 1903 (Build 18362)
- [ ] Windows 10 1909 (Build 18363)
- [ ] Windows 10 2004 (Build 19041)
- [ ] Windows 10 20H2 (Build 19042)
- [ ] Windows 10 21H1 (Build 19043)
- [ ] Windows 10 21H2 (Build 19044)
- [ ] Windows 10 22H2 (Build 19045)
- [ ] Windows 11 21H2 (Build 22000)
- [ ] Other (specify)

### Other Windows Build number

_No response_

### App minimum and target SDK version

- [ ] Windows 10, version 1809 (Build 17763)
- [ ] Windows 10, version 1903 (Build 18362)
- [ ] Windows 10, version 1909 (Build 18363)
- [ ] Windows 10, version 2004 (Build 19041)
- [ ] Windows 10, version 2104 (Build 20348)
- [ ] Windows 11, version 22H2 (Build 22000)
- [ ] Other (specify)

### Other SDK version

_No response_

### Visual Studio Version

2022

### Visual Studio Build Number

_No response_

### Device form factor

Desktop

### Additional context

_No response_

### Help us help you

No, I'm unable to contribute a solution.

Beginne damit, den Fehler mit dem XAML-Layout und der Version 8.0.240109 von CommunityToolkit.WinUI.Controls.TokenizingTextBox anhand des verlinkten Beispiels TokenizingTextBoxBugDemo zu reproduzieren. Verfolge das Measure-Verhalten des Steuerelements und überprüfe, dass das zweispaltige Grid ohne die gemeldete WinRT-Ausnahme gerendert wird.

Vom Indexierungsmodell aus dem Issue-Text verfasst.