Mixing named arguments + callback style and getter should not compile

I think the code below should not compile.

**Repro steps**

Provide the steps required to reproduce the problem:

```fs
type LabeledProperty =

abstract member alert: title:string * message:string option -> unit with get,set
```

Looking at the C# output it gives the following result which looks incomplete.

```cs
[CompilationMapping(SourceConstructFlags.Module)]
public static class @_
{
[Serializable]
[CompilationMapping(SourceConstructFlags.ObjectType)]
public interface LabeledProperty
{
override Unit alert { get; set; }
}
}
```

**Expected behavior**

F# compiler should fails the compilation ?

**Provide any related information (optional):**

* Operating system: OSX
* .NET Runtime kind (.NET Core, .NET Framework, Mono): .NET Core 8.0.401
* Editing Tools (e.g. Visual Studio Version, Visual Studio)