### 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)

if (motion_results.size() == 0) {
		return Ref<KinematicCollision3D>();
	}
	return _get_slide_collision(motion_results.size() - 1);
}
bool CharacterBody3D::is_floor_stop_on_slope_enabled() const {
	return floor_stop_on_slope;
}
void CharacterBody3D::set_floor_stop_on_slope_enabled(bool p_enabled) {
	floor_stop_on_slope = p_enabled;
}
bool CharacterBody3D::is_floor_constant_speed_enabled() const {
	return floor_constant_speed;
}
void CharacterBody3D::set_floor_constant_speed_enabled(bool p_enabled) {
	floor_constant_speed = p_enabled;
}
bool CharacterBody3D::is_floor_block_on_wall_enabled() const {
	return floor_block_on_wall;
}
void CharacterBody3D::set_floor_block_on_wall_enabled(bool p_enabled) {
	floor_block_on_wall = p_enabled;
}
bool CharacterBody3D::is_slide_on_ceiling_enabled() const {
	return slide_on_ceiling;
}
void CharacterBody3D::set_slide_on_ceiling_enabled(bool p_enabled) {