### 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)

platform_rid = p_collision.collider;
	platform_object_id = p_collision.collider_id;
	platform_velocity = p_collision.collider_velocity;
	platform_angular_velocity = p_collision.collider_angular_velocity;
	platform_layer = PhysicsServer3D::get_singleton()->body_get_collision_layer(platform_rid);
}
void CharacterBody3D::set_safe_margin(real_t p_margin) {
	margin = p_margin;
}
real_t CharacterBody3D::get_safe_margin() const {
	return margin;
}
const Vector3 &CharacterBody3D::get_velocity() const {
	return velocity;
}
void CharacterBody3D::set_velocity(const Vector3 &p_velocity) {
	velocity = p_velocity;
}
bool CharacterBody3D::is_on_floor() const {
	return collision_state.floor;
}
bool CharacterBody3D::is_on_floor_only() const {
	return collision_state.floor && !collision_state.wall && !collision_state.ceiling;
}
bool CharacterBody3D::is_on_wall() const {
	return collision_state.wall;
}
bool CharacterBody3D::is_on_wall_only() const {