ObservableProperty source generator messes up named arguments for attributes assigned with property:attribute

### Describe the bug

When adding a custom attribute using [property:MyAttribute] the ObservableProperty source generator does not generate named arguments passed to the attributes constructor.

### Regression

_No response_

### Steps to reproduce

1. Custom attribute with optional constructor arguments
```cs
public sealed class PropertyListIncludeAttribute : Attribute
{
public string? Category { get; private init; }
public string? Label { get; private init; }

public PropertyListIncludeAttribute(string? label = null, string? category = null)
{
Label = label;
Category = category;
}
}
```

2. Usage with ObservableProperty
```cs
[ObservableProperty]
[property: PropertyListInclude(category: "Another Category")]
private int testInt;
```

3. See problem in source generated result
```cs
///
[global::System.CodeDom.Compiler.GeneratedCode("CommunityToolkit.Mvvm.SourceGenerators.ObservablePropertyGenerator", "8.3.0.0")]
[global::System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
[global::DotNetElements.DevTools.SDK.Core.PropertyListIncludeAttribute("Another Category")]
public int TestInt
{
get => testInt;
set
{
if (!global::System.Collections.Generic.EqualityComparer.Default.Equals(testInt, value))
{
OnTestIntChanging(value);
OnTestIntChanging(default, value);
OnPropertyChanging(global::CommunityToolkit.Mvvm.ComponentModel.__Internals.__KnownINotifyPropertyChangingArgs.TestInt);
testInt = value;
OnTestIntChanged(value);
OnTestIntChanged(default, value);
OnPropertyChanged(global::CommunityToolkit.Mvvm.ComponentModel.__Internals.__KnownINotifyPropertyChangedArgs.TestInt);
}
}
}
```

### Expected behavior

Named arguments need to be properly passed to the source generator
```cs
[global::DotNetElements.DevTools.SDK.Core.PropertyListIncludeAttribute(category:"Another Category")]
```

### Screenshots

_No response_

### IDE and version

VS 2022

### IDE version

_No response_

### Nuget packages

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

### Nuget package version(s)

8.3.2

### Additional context

_No response_

### Help us help you

No, just wanted to report this