Revert "actor: Unconditionally set show_on_set_parent"
Revert "actor: Unconditionally set show_on_set_parent"

This reverts commit 81b19a78f5e02ae8ffd9235054d80b172496415b.

The commit breaks the conformance test unit for the invariants we
guarantee for the 1.x API:

ERROR:actor-invariants.c:307:actor_show_on_set_parent: assertion failed: (show_on_set_parent)

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