[.NET 8][MVC] Created() method on IActionResult returns 204NoContent StatusCode

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Describe the bug

.NET 8. When controller endpoint has return type `IActionResult` and return object is made by parameterless Created() method, response status code is 204. The workaround is following:
```csharp
return Created((string)null, null);
```

### Expected Behavior

I do not mean, that when there is no content in the response, then NoContent should not be returned, but when I explicitly want to return 201, I would expect 201, otherwise it's a breaking change for the contract of our WebAPI.

### Steps To Reproduce

```csharp
[HttpPost("TestB")]
public IActionResult Post()
{
return Created();
}
```

### Exceptions (if any)

_No response_

### .NET Version

8.0.400

### Anything else?

_No response_