Support for setting Policies onto Virtual Machines

[loulecrivain]

Environment

• Nautobot version: 2.4.10
• nautobot-firewall-models version: 2.2.3a0 (dev)

Proposed Functionality

Currently, the Nautobot Firewall App only supports setting policies on dcim.Devices. Some new platforms supported by Aerleon (i.e, Proxmox VE Hypervisor SDN Firewall), support directly setting a policy on a VM.

See:
https://pve.proxmox.com/wiki/Firewall#pve_firewall_vm_container_configuration

Use Case

As a Nautobot Firewall App user, when: editing and/or creating a policy

I should be able to: assign the policy to a virtual machine

Additionally, I should also be able to generate firewall rules (any kind where it'd make sense) for the Virtual Machine in question.

[loulecrivain]

FYI I'm working on a PR on my end currently.