update manipulators to avoid using vector scale Transform functions

Code/Framework/AzToolsFramework/AzToolsFramework/Manipulators/LineSegmentSelectionManipulator.cpp

@@ -31,7 +31,7 @@ namespace AzToolsFramework
             rayProportion, lineSegmentProportion, worldClosestPositionRay, worldClosestPositionLineSegment);
 
         AZ::Transform worldFromLocalNormalized = worldFromLocal;
-        const AZ::Vector3 scale = worldFromLocalNormalized.ExtractScale() * nonUniformScale;
+        const AZ::Vector3 scale = worldFromLocalNormalized.ExtractUniformScale() * nonUniformScale;
         const AZ::Transform localFromWorldNormalized = worldFromLocalNormalized.GetInverse();
 
         return { (localFromWorldNormalized.TransformPoint(worldClosestPositionLineSegment)) / scale };

Code/Framework/AzToolsFramework/AzToolsFramework/Manipulators/LinearManipulator.cpp

@@ -59,7 +59,7 @@ namespace AzToolsFramework
             ? CalculateSnappedOffset(localTransform.GetTranslation(), axis, gridSize * scaleRecip)
             : AZ::Vector3::CreateZero();
 
-        const AZ::Vector3 localScale = localTransform.GetScale();
+        const AZ::Vector3 localScale = AZ::Vector3(localTransform.GetUniformScale());
         const AZ::Quaternion localRotation = QuaternionFromTransformNoScaling(localTransform);
         // calculate scale amount to snap, to align to round scale value
         const AZ::Vector3 scaleSnapOffset = snapping && !gridSnapAction.m_localSnapping

Code/Framework/AzToolsFramework/AzToolsFramework/Manipulators/ManipulatorSnapping.h

@@ -113,7 +113,7 @@ namespace AzToolsFramework
     /// noise in the value returned when dealing with values far from the origin.
     inline float ScaleReciprocal(const AZ::Transform& transform)
     {
-        return Round3(transform.GetScale().GetReciprocal().GetMinElement());
+        return Round3(1.0f / transform.GetUniformScale());
     }
 
     /// Find the reciprocal of the non-uniform scale.

Code/Framework/AzToolsFramework/AzToolsFramework/Manipulators/ManipulatorSpace.cpp

@@ -39,7 +39,7 @@ namespace AzToolsFramework
         AZ::Transform result;
         result.SetRotation(m_space.GetRotation() * localTransform.GetRotation());
         result.SetTranslation(m_space.TransformPoint(m_nonUniformScale * localTransform.GetTranslation()));
-        result.SetScale(m_space.GetScale() * localTransform.GetScale());
+        result.SetScale(m_space.GetScale() * localTransform.GetUniformScale());
         return result;
     }