Figure out how to enable ml2 ansible networking in new RH OpenStack

[tzumainn]

From Surbhi's research:

3. How does Neutron manage switches (in the absence of ML2-Ansible networking)?

Without ML2-Ansible networking, Neutron cannot dynamically manage switches.
Network configurations must be static and predefined in the current setup.
Work is underway to enable tools like networking-generic-switch and networking-baremetal for switch configuration, but these are not integrated capabilities yet.
ML2 is supported plugin-wise, but containers need to be patched with customer-supplied ML2 plugins.

We might be able to patch the container and test these features.

There are two distinct workflows:

One for BMaaS nodes, which ML2 plugins can manage dynamically for networking.
Another for nodes hosting VMs, which are managed by Metal3/Ironic independently.