Partial ObservableProperty in ObservableObject shows error CS0229 ambiguity between property and property

### Describe the bug

I'm developing a WinUI application with Community Toolkit MVVM 8.4.0.
I switched the properties in my application to use the new format. Here's one example:

```
[ObservableProperty]
public partial bool Returned { get; set; } = returned;
```
And this is a simplified version of the constructor for the object:
`public partial class Item(bool returned) : ObservableObject`

This all works as expected and compiles fine but all uses of the property elsewhere show the Compiler Error CS0229. In this case it shows:
`Ambiguity between Item.Returned and Item.Returned.`
I only have the one property called Returned.
As I said, it all compiles fine and works correctly but I'm not able to get rid of the error.

### Regression

_No response_

### Steps to reproduce

Create a class with the type ObservableObject and create a partial Observable Property. Use it elsewhere in the app.

Example:
```
public partial class Item(bool returned) {
[ObservableProperty]
public partial bool Returned { get; set; } = returned;
}
```
Then access the property somewhere else in the app.

Example:
```
var newItem = new Item(false);
newItem.Returned = true;
```
This shows the compiler error.

### Expected behavior

I would like to remove the false alarm.

### Screenshots


### IDE and version

VS 2022

### IDE version

Version 17.13.1

### Nuget packages

- [ ] CommunityToolkit.Common
- [ ] CommunityToolkit.Diagnostics
- [ ] CommunityToolkit.HighPerformance
- [x] CommunityToolkit.Mvvm (aka MVVM Toolkit)

### Nuget package version(s)

8.4.0

### Additional context

_No response_

### Help us help you

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