Use the SDK for the server show command. This change modifies a helper
function that is used by server show as well as other commands that
print information about an individual server. The helper still uses
novaclient APIs when additional OpenStack requests are needed since some
of its callers are still using the nova client.
Depends-On: https://review.opendev.org/c/openstack/openstacksdk/+/864340
Change-Id: Ic253184ee5f911ec2052419d328260dc4664b273
70dbb01ea3