[FromBody] attribute with an empty body request should set the default value of nullable value types to null.

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Describe the bug

Controlled-based API uses additional conditions to check the nullable value type

https://github.com/dotnet/aspnetcore/blob/2f1db20456007c9515068a35a65afdf99af70bc6/src/Mvc/Mvc.Core/src/Infrastructure/ParameterDefaultValues.cs#L40
https://github.com/dotnet/runtime/blob/2aade6beb02ea367fd97c4070a4198802fe61c03/src/libraries/Common/src/Extensions/ParameterDefaultValue/ParameterDefaultValue.cs#L35,

which doesn't exist in the minimal API approach

https://github.com/dotnet/aspnetcore/blob/2f1db20456007c9515068a35a65afdf99af70bc6/src/Http/Http.Extensions/src/RequestDelegateFactory.cs#L1323

### Expected Behavior

The default value of nullable value types should be null when the request body is empty.

### Steps To Reproduce

[This repo](https://github.com/opuzakov/web-api) contains two web API projects: controller-based and minimal. The controller-based approach sets the int? default value to null, and the minimal API to 0.

### Exceptions (if any)

_No response_

### .NET Version

8.0.303

### Anything else?

_No response_