Network trunk commands originally were added to python-neutronclient,
although we can long consider these operations core Networking operations.
This patch is not a blind copy but also changes the original code to use
openstacksdk python bindings instead of the binding code in
python-neutronclient as that is already deprecated.
Change-Id: Ic4bc35c296a95d5dae92e9fc1cab3a3fa8f103cd
Related-Bug: #1999774