Fix missing anchor point check in hasAnimations()

anchorPointProperty() was not included in the hasAnimations() check,
causing layers with only anchor point animations to fall through to
the static transform path in both QML and item generator rendering.

Pick-to: 6.12
Fixes: QTBUG-148400
Change-Id: I647d26a3638227cef9020d5e0faab9bac0f94717
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>