Game thread anim task evaluation can happen on first frame update even when bTickAnimationOnSkeletalMeshInit is unset

The bTickAnimationOnSkeletalMeshInit should prevent a game thread update of the anim instance on the frame that a mesh is spawned.  However, a bug in RefreshBoneTransforms is resulting in a game thread update happening anyway in many circumstances.  This is due to the following check not being the same between the main anim instance vs the post process anim instance:

if (AnimScriptInstance && !AnimScriptInstance->NeedsUpdate())			
{				
  bShouldTickAnimation = !AnimScriptInstance->GetUpdateCounter().HasEverBeenUpdated();			
}
			
bShouldTickAnimation = bShouldTickAnimation || (ShouldPostUpdatePostProcessInstance() && !PostProcessAnimInstance->GetUpdateCounter().HasEverBeenUpdated()); 

1. Create a new project
2. In the project settings, disable Tick Animation On Skeletal Mesh Init
3. Setup a character blueprint with whatever mesh and anim blueprint you want
   1. Set the visibility based tick settings on the mesh component to be Always Tick Pose and Refresh Bones
4. Drop the character into the level
5. Add a breakpoint to the following line in USkeletalMeshComponent::RefreshBoneTransforms

                // We bypass TickPose() and call TickAnimation directly, so URO doesn't intercept us.
                TickAnimation(0.f, false); 

1. PIE
   1. Expected behaviour: the above line shouldn't be hit
   2. Actual behaviour: we do hit the above line which triggers a game thread execution of the anim evaluation tasks