Added a new port extension: device profile (``port_device_profile``).
This extension adds the "device_profile" parameter to the "port" API
and specifies the device profile per port. This parameter is a
string.
This parameter is passed to Nova and Nova retrieves the requested
device profile from Cyborg. Reference:
https://docs.openstack.org/api-ref/accelerator/v2/index.html#
device-profiles
For backwards compatibility, this parameter will be "None" by
default.
Closes-Bug: #1906602
Depends-On: https://review.opendev.org/c/openstack/neutron-lib/+/767586
Change-Id: I1202a8388e64ae4270ef4ca118993504ae7c1731