Support Neutron Trunk Port resource

[hjensas]

What would you like to see implemented?

I would like support for Neutron Trunk Port resources.
Neutron docs: https://docs.openstack.org/neutron/latest/admin/config-trunking.html

Additional information

Background - in the future I would like to see if replacing or have k-orc as an option to Openstack Heat in https://github.com/openstack-k8s-operators/hotstack. It uses Neutron Trunk Port resources.

Link to reference documentation

https://docs.openstack.org/api-ref/network/v2/#trunk-networking

[aldokimi]

Hello @mandre , can you assign this issue to me?

[mandre]

Implemented via #581.