Enable LXD networking

Ensure that networking traffic is forwarded to and from LXD instances
using nftables.

Change-Id: I8b959dcfd2ebba10c24dc06442d3239ea17ec211

roles/charmbuild/tasks/main.yaml

@@ -12,6 +12,12 @@
     name: snapd
   become: true
 
+- name: nftables is installed
+  apt:
+    name: nftables
+  become: true
+  when: ansible_distribution_release == 'jammy' or ansible_distribution_release == 'noble'
+
 - name: lxd snap is installed
   snap:
     name: lxd
@@ -22,6 +28,11 @@
   command: lxd init --auto
   become: true
 
+- name: allow packets from lxd bridge
+  command: nft insert rule filter openstack-INPUT iif lxdbr0 accept
+  become: true
+  when: ansible_distribution_release == 'jammy' or ansible_distribution_release == 'noble'
+
 - name: current user is in lxd group
   user:
     name: "{{ ansible_user }}"