remove support for FXRMotionControllerData on UE 5.7 as it has been obliterated by the upstream and apply necessary changes to make XR_EXT_hand_tracking work again on 5.7

Source/SenseGloveDebug/Private/SGDebug/SGDebugVirtualHand.cpp

@@ -44,49 +44,6 @@
 #include "SGDebug/SGDebugCube.h"
 #include "SGDebug/SGDebugGizmo.h"
 
-void FSGDebugVirtualHand::Draw(
-    const UWorld* World,
-    const FXRMotionControllerData& MotionControllerData,
-    const FSGVirtualHandDebuggingSettings& Settings)
-{
-    if (!ensureAlwaysMsgf(
-        Settings.DrawingMode != ESGDebugVirtualHandDrawingMode::None,
-        TEXT("Invalid virtual hand drawing mode!")))
-    {
-        return;
-    }
-
-    if (!ensureAlwaysMsgf(
-        MotionControllerData.bValid,
-        TEXT("Invalid motion controller data!")))
-    {
-        return;
-    }
-
-    if (!ensureAlwaysMsgf(
-        MotionControllerData.HandKeyPositions.Num() == MotionControllerData.HandKeyRotations.Num(),
-        TEXT("Mismatched motion controller data positions and rotations!")))
-    {
-        return;
-    }
-
-    for (TArray<FVector>::SizeType HandKeyIndex = 0;
-         HandKeyIndex < MotionControllerData.HandKeyPositions.Num(); ++HandKeyIndex)
-    {
-        const FVector& HandKeyPosition{MotionControllerData.HandKeyPositions[HandKeyIndex]};
-        const FQuat& HandKeyRotation{MotionControllerData.HandKeyRotations[HandKeyIndex]};
-
-        if (Settings.DrawingMode == ESGDebugVirtualHandDrawingMode::CubicJoints)
-        {
-            FSGDebugCube::Draw(World, HandKeyPosition, HandKeyRotation, Settings.DebugCubicHandSettings);
-        }
-        else if (Settings.DrawingMode == ESGDebugVirtualHandDrawingMode::GizmoJoints)
-        {
-            FSGDebugGizmo::Draw(World, HandKeyPosition, HandKeyRotation, Settings.DebugGizmoHandSettings);
-        }
-    }
-}
-
 #if ENGINE_MAJOR_VERSION >= 5 && ENGINE_MINOR_VERSION >= 5
 void FSGDebugVirtualHand::Draw(
     const UWorld* World,