This change ensures that if we are upgrading a
InstanceNUMACell object created before victoria
<1.5 that we properly set pcpuset=set() when
loading the object form the db.
This is requried to support instances with a numa
topology that do not use cpu pinning.
Depends-On: https://review.opendev.org/c/openstack/python-openstackclient/+/929236
Closes-Bug: #2080556
Change-Id: Iea55aabe71c250d8c8e93c61421450b909a7fa3d
Sean Mooney