### Godot version

v4.1.beta

### System information

Windows 10

### Issue description

```
        virtual Ref<Script> get_script() const override {
                if (native_info->get_script_func) {
                        GDExtensionObjectPtr script = native_info->get_script_func(instance);
                        return Ref<Script>(reinterpret_cast<Script *>(script));
                }
                return Ref<Script>();
```
Is not creating a functional reference.

GDExtensionObjectPtr is a part of gdextension_interface and is a void pointer to pas data pointers between GDExtesion and Godot Core.

In the images below you are able to see that the extension `reinterpret_cast `works fine.
And that the pointer is passed to core.
However at core `Ref<Script> script_test` stays a NULL value

![image](https://github.com/godotengine/godot/assets/20573784/d4a955d3-4e02-46e2-abf1-ba88cf501e8f)
![image](https://github.com/godotengine/godot/assets/20573784/42a3fbb8-3598-479a-86bc-8b9464624885)
![image](https://github.com/godotengine/godot/assets/20573784/620782c0-192c-4e14-829c-5817ae680378)

I was hoping this would be solved by solving [cpp 1119](https://github.com/godotengine/godot-cpp/issues/1119)



### Steps to reproduce

Create a custom script instance and create it using `internal::gdextension_interface_script_instance_create` and a `GDExtensionScriptInstanceInfo` that only implements `get_property_list_func` and `get_script_func`.

### Minimal reproduction project

Difficult to create a minimal project.
Mostly looking for advice on what to test to find the actual source problem
int ret = 0;
		GDVIRTUAL_REQUIRED_CALL(_profiling_get_accumulated_data, p_info_arr, p_info_max, ret);
		return ret;
	}
	EXBIND0(frame)
	EXBIND1RC(bool, handles_global_class_type, const String &)
	GDVIRTUAL1RC(Dictionary, _get_global_class_name, const String &)
	virtual String get_global_class_name(const String &p_path, String *r_base_type = nullptr, String *r_icon_path = nullptr) const override {
		Dictionary ret;
		GDVIRTUAL_REQUIRED_CALL(_get_global_class_name, p_path, ret);
		if (!ret.has("name")) {
			return String();
		}
		if (r_base_type != nullptr && ret.has("base_type")) {
			*r_base_type = ret["base_type"];
		}
		if (r_icon_path != nullptr && ret.has("icon_path")) {
			*r_icon_path = ret["icon_path"];
		}
		return ret["name"];
	}
};
VARIANT_ENUM_CAST(ScriptLanguageExtension::LookupResultType)
VARIANT_ENUM_CAST(ScriptLanguageExtension::CodeCompletionKind)
VARIANT_ENUM_CAST(ScriptLanguageExtension::CodeCompletionLocation)
class ScriptInstanceExtension : public ScriptInstance {