feat(Samples): Added Debug Lines to Mirrored Full Body

Summary:
Added Debug lines for Mirrored Full Body by a new prefab variant called DebugBonesOVRSkeletonFullBodyMirrored.
Added OVR Body and OVR Skeleton to the ArmatureSkinningUpdateRetargetMirrored game object
Referenced ArmatureSkinningUpdateRetargetMirrored on the FullBodyOVRSkeletonBoneVisualizer attached to the DebugBonesOVRSkeletonFullBodyMirrored.
 {F1817250763}

Reviewed By: andkim-meta, sohailshafiiWk

Differential Revision: D61561904

fbshipit-source-id: 1618a157694ea804477d327a0206669e052b3fea

Author: SarahMMeta