Add VPNaaS for OVN

[mnaser]

At the moment, upstream is fully stalled out on merging OVN support:

• https://review.opendev.org/c/openstack/neutron-tempest-plugin/+/847007
• https://review.opendev.org/c/openstack/neutron-vpnaas/+/765353
• https://review.opendev.org/c/openstack/neutron-tempest-plugin/+/889294
• https://review.opendev.org/c/openstack/neutron-vpnaas/+/895651

Since we've got users and customers that rely on this functionality, we're going to start maintaining a fork that has this fix. We need the following work items:

• Fork neutron-vpnaas and backport all the way to stable/zed
• Build images with our fork of neutron-vpnaas
• Update Helm charts to support the new agent for VPN with OVN

[mnaser]

I merged the backports but I was able to +W the neutron-vpnaas change into master which is neat.

I kinda did a merge commit instead of rebase which means 2 commits got added on top... do you feel like recreating the repo and creating the PRs again so I can merge with rebase @ricolin ?

[ricolin]

I merged the backports but I was able to +W the neutron-vpnaas change into master which is neat.

I kinda did a merge commit instead of rebase which means 2 commits got added on top... do you feel like recreating the repo and creating the PRs again so I can merge with rebase @ricolin ?

I just reset repo and PRs

[mnaser]

@ricolin good catch. I think we just need to test this manually now if possible.

[ricolin]

@ricolin good catch. I think we just need to test this manually now if possible.

workon build newest env for test now