PhysicsChain should use default PhysicsShape.MoverData

When a PhysicsChain is created, it is not using the default PhysicsShape.MoverData: https://docs.unity3d.com/6000.3/Documentation/ScriptReference/LowLevelPhysics2D.PhysicsShape.MoverData.html

The default is to clip velocity with a maximum push limit.

First reported here: https://discussions.unity.com/t/low-level-2d-physics-in-unity-6-3-beta/1683247/22