update more calls to Transform to use uniform scale

Gems/AtomLyIntegration/CommonFeatures/Code/Source/Animation/AttachmentComponent.cpp

@@ -243,14 +243,14 @@ namespace AZ
             {
                 // apply offset in world-space
                 finalTransform = m_targetEntityTransform * m_targetBoneTransform;
-                finalTransform.SetScale(AZ::Vector3::CreateOne());
+                finalTransform.SetUniformScale(1.0f);
                 finalTransform *= m_targetOffset;
             }
             else if (m_scaleSource == AttachmentConfiguration::ScaleSource::TargetEntityScale)
             {
                 // apply offset in target-entity-space (ignoring bone scale)
                 AZ::Transform boneNoScale = m_targetBoneTransform;
-                boneNoScale.SetScale(AZ::Vector3::CreateOne());
+                boneNoScale.SetUniformScale(1.0f);
 
                 finalTransform = m_targetEntityTransform * boneNoScale * m_targetOffset;
             }

Gems/Vegetation/Code/Source/DynamicSliceInstanceSpawner.cpp

@@ -309,7 +309,7 @@ namespace Vegetation
 
         // Create a Transform that represents our instance.
         AZ::Transform world = AZ::Transform::CreateFromQuaternionAndTranslation(instanceData.m_alignment * instanceData.m_rotation, instanceData.m_position);
-        world.MultiplyByScale(AZ::Vector3(instanceData.m_scale));
+        world.MultiplyByUniformScale(instanceData.m_scale);
 
         // Request a new dynamic slice instance.
         AzFramework::SliceInstantiationTicket* ticket = new AzFramework::SliceInstantiationTicket();