Comment 1 for bug 1928683

I figured that that change introduced the cpu_shared_set and cpu_dedicated_set in the wrong section of nova.conf. It should be on the [compute] section, not on [DEFAULT]: https://github.com/openstack/nova/blob/stable/ussuri/nova/conf/compute.py#L317

Opened a review to put those configs on the right config section, remove the `shared_pcpu_map` that is a legacy config that is not in use anymore and also fix the value for `cpu_dedicated_set` that was using the wrong variable: https://review.opendev.org/c/starlingx/openstack-armada-app/+/791526

Already tested with a custom build and the VMs are now being scheduled on the right cores.
This probably will need to be cherry-picked to stx.5.0.