Unify methods from the ClusterRendererMultipleItems into ClusterRenderer #1487
Description
The PR implementing ClusterRendererMultipleItems adds methods for managing animations in a renderer.
These changes were applied to ClusterRendererMultipleItems instead of ClusterRenderer to avoid introducing a breaking change.
Once the feature has been sufficiently tested and deemed stable, these methods could be moved to the base ClusterRenderer to extend this functionality to all renderers.