Added a new port extension: NUMA affinity policy. This extension adds
the "numa_affinity_policy" parameter to the "port" API and specifies
the NUMA affinity policy per port.
This parameter is passed to Nova when a virtual machine is created.
Nova will use this information to schedule the virtual machine.
For backwards compatibility, this parameter will be "None" by default.
Depends-On: https://review.opendev.org/#/c/740058/
Closes-Bug: #1886798
Change-Id: Ie3d68c098ddb727ab8333aa1de4064e67a4f00a7