This extension allows to update the port flag "propagate_uplink_status",
used by the ML2/SR-IOV agent to define a VF port link state as "auto"
(the VF will mimic the PF port link status).
The neutron-lib version required is at least 3.16.0, that includes [1].
[1]https://review.opendev.org/c/openstack/neutron-lib/+/927820
Closes-Bug: #2078661
Change-Id: Ic3c85d296cf3391b157c531d7bde90c6dbee2f8e