### Godot version

v4.0.3.stable.official [5222a99f5]

### System information

Windows 10

### Issue description

If a `CharacterBody3D`'s parent node is in a position other than the origin, the difference will be included in its `get_position_delta()` value, and therefore also `get_real_velocity()`. This is because [the implementation](https://github.com/godotengine/godot/blob/3710f069293f2fde8afe33fea898c4b36fa5e943/scene/3d/physics_body_3d.cpp#L1782-L1784) subtracts the current **local** transform from the old **global** transform. I don't know if behaviour in this case is defined at all, but I would expect it to be consistent with everything else in the `CharacterBody3D` context, such that if `velocity` is zero, `get_position_delta()` is also zero. The same applies to `CharacterBody2D`.

### Steps to reproduce

1. Create a `Node3D` with a `CharacterBody3D` in it
2. Move the `Node3D`
3. Call `move_and_slide()` in the `CharacterBody3D` and observe `get_position_delta()`

### Minimal reproduction project

[godot cb3d.zip](https://github.com/godotengine/godot/files/11861307/godot.cb3d.zip)

ERR_FAIL_COND(p_inertia.x < 0);
	ERR_FAIL_COND(p_inertia.y < 0);
	ERR_FAIL_COND(p_inertia.z < 0);
	inertia = p_inertia;
	PhysicsServer3D::get_singleton()->body_set_param(get_rid(), PhysicsServer3D::BODY_PARAM_INERTIA, inertia);
}
const Vector3 &RigidBody3D::get_inertia() const {
	return inertia;
}
void RigidBody3D::set_center_of_mass_mode(CenterOfMassMode p_mode) {
	if (center_of_mass_mode == p_mode) {
		return;
	}
	center_of_mass_mode = p_mode;
	switch (center_of_mass_mode) {
		case CENTER_OF_MASS_MODE_AUTO: {
			center_of_mass = Vector3();
			PhysicsServer3D::get_singleton()->body_reset_mass_properties(get_rid());
			if (inertia != Vector3()) {
				PhysicsServer3D::get_singleton()->body_set_param(get_rid(), PhysicsServer3D::BODY_PARAM_INERTIA, inertia);
			}
		} break;
		case CENTER_OF_MASS_MODE_CUSTOM: {
			PhysicsServer3D::get_singleton()->body_set_param(get_rid(), PhysicsServer3D::BODY_PARAM_CENTER_OF_MASS, center_of_mass);
		} break;
	}
}
RigidBody3D::CenterOfMassMode RigidBody3D::get_center_of_mass_mode() const {