Inherited ViewModels can hide important warnings

### Describe the bug

If an `ObservableProperty` is created in two ViewModels, a parent and child, then the parent property gets hidden and the warning is blocked from the user.

### Regression

_No response_

### Steps to reproduce

```text
For this code:

public partial class ParentViewModel : ObservableObject
{
[ObservableProperty] private int _someValue;
public int AnotherValue { get; set; }
}

public partial class DerivedViewModel : ParentViewModel
{
[ObservableProperty] private int _someValue;
public int AnotherValue { get; set; }
}

The following warning is generated:

> 'DerivedViewModel.AnotherValue' hides inherited member 'ParentViewModel.AnotherValue'. Use the new keyword if hiding was intended.
```

### Expected behavior

The following warning should also be generated:

> 'DerivedViewModel.SomeValue' hides inherited member 'ParentViewModel.SomeValue'. Use the new keyword if hiding was intended.

### Screenshots

_No response_

### IDE and version

VS 2022

### IDE version

17.3.0

### Nuget packages

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

### Nuget package version(s)

8.0.0

### Additional context

This is due to warnings being disabled with

```cs
#pragma warning disable
```

Fix options:

1. The pragma is enabled for this warning

- Pros: Warning might alert the user to unintended functionality
- Cons: User can't suppress the warning

2. Option 1 plus `ObservableProperty` is modified to accept a parameter that says whether hiding is desired

- Pros: The warning is exposed and can be suppressed
- Cons: May not be worth the complication

### Help us help you

Yes, I'd like to be assigned to work on this item