Now the shape in the physics server is unbound only when it's unparented from its body, because if it's unbound when just exiting the tree, a later readd would have the body shapeless in the server.
It's the same currently being done in 2D physics.
Fixes#10074.
-Added new 3D stream player node
-Added ability for Area to capture sound from streams
-Added small features in physics to be able to properly guess distance to areas for sound
-Fixed 3D CollisionObject so shapes are added the same as in 2D, directly from children
-Fixed KinematicBody API to make it the same as 2D.
