actor: Consolidate rotation angle internal setter
actor: Consolidate rotation angle internal setter

Use the GParamSpec, instead of the rotation axis enumeration, to
simplify the caller code, similarly to how we handle scaling and
translation factors.

djdeath/clutter,heysion/clutter-clone,heysion/clutter-clone,djdeath/clutter-android,djdeath/clutter,jigpu/clutter,Distrotech/clutter,GNOME/clutter,Distrotech/clutter,jigpu/clutter,GNOME/clutter,djdeath/clutter,jigpu/clutter,GNOME/clutter,djdeath/clutter,Distrotech/clutter,Distrotech/clutter,heysion/clutter-clone,djdeath/clutter-android,jigpu/clutter,GNOME/clutter,Distrotech/clutter,collects/clutter,ebassi/clutter,ebassi/clutter,jigpu/clutter,djdeath/clutter-android,djdeath/clutter,collects/clutter,GNOME/clutter,ebassi/clutter,collects/clutter,heysion/clutter-clone,jigpu/clutter,djdeath/clutter-android,ebassi/clutter,collects/clutter,Distrotech/clutter,djdeath/clutter,djdeath/clutter-android,ebassi/clutter,collects/clutter,heysion/clutter-clone