We are starting over with the container nodepool host, and also moving
it to "nb04" to avoid any possibility of conflicting with the
short-hostname of nb01.openstack.org.
Story: #2007407
Task: #39064
Depends-On: https://review.opendev.org/713575
Depends-On: https://review.opendev.org/713571
Change-Id: I18ab9834ad4da201774e0abef56f618cd7839d36