Instance derived from Object deleting all its children before destruction

### Godot version

4.2

### godot-cpp version

4.2

### System information

Windows 11

### Issue description

Object::~Object() removes all the children and deletes them before the destructor of the derived class. Shouldn't I delete the children myself?

### Steps to reproduce

With the code below, destruction of B may lead to a crash. (In my circumstance, the editor crashes when I open the project the second time)
```cpp
using namespace godot;

class A: public Node {
GDCLASS(A, Node);

protected:
static void _bind_methods() {}

public:
A() {}
};

class B: public Node {
GDCLASS(B, Node);

protected:
static void _bind_methods() {}

private:
A *a;

public:
B(): a(memnew(A)) { this->add_child(this->a); }

~B() {
// a is removed and deleted before destruction, either of the below may lead to a crash
// this->remove_child(this->a);
memdelete(this->a);
}
};

```

```GDScript
def _ready():
B.new()
```

### Minimal reproduction project

N/A