cally: fix state set leak

cally_actor_action_do_action leaks a state set object in the
case where the actor is defunct, insensitive, or hidden.

This commit plugs the leak.

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1225


(cherry picked from commit 79e5ec57d24f1650cdb2f23e68c9f8bf6a494283)