Changing preview mesh appears to affect initial transforms of all control rigs in level viewport

It seems that switching the preview mesh in the control rig editor is affecting the initial transforms in the hiearchies of related control rigs in the level viewport.  This seems to be due to the call in FControlRigEditor::HandleSetObjectBeingDebugged where we set the new hierarchy on the control rig blueprint:

RigBlueprint->Hierarchy->CopyPose(DebuggedControlRig->GetHierarchy(), false, true, false); 

The new hierarchy is then copied to the CDO which is then copied to each of the control rigs when the blueprint is compiled.  That changes the pose of the mesh in the level viewport.

1. Go to the linked tick and download the project attached to the message from April 12, 2024 
2. Open the UDN test project
3. Open Test level
   1. There should be two quadruped characters in the level. 
4. Open CR_FourLeggedAnimation
5. Change the preview mesh
6. Expected behaviour: The control rig running in the control rig editor should update to reflect the initial transforms of the new preview mesh
7. Actual behaviour: All instances of the control rig update to reflect the initial transforms of the preview mesh, including those in the level viewport that don't use this mesh

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