Add ability to adjust mulitcast settings on a network bridge

[steven-ellis]

When creating a bridge you need to adjust some of the multicast settings for service discovery like ssdp to work correctly

nmcli connection modify br0 bridge.multicast-snooping on
nmcli connection modify br0 bridge.multicast-querier on

The YAML could look something like

        bridge:
           multicast-snooping: true
           multicast-querier: true

[liangwen12year]

The multicast settings on the network bridge are already supported in network_state variable.

Here is an example for specifying it:

  - name: Set the multicast settings using network_state
    vars:
      network_state:
        interfaces:
        - name: br0
          type: linux-bridge
          state: up
          bridge:
            options:
              multicast-querier: true
              multicast-snooping: true
    ansible.builtin.include_role:
      name: linux-system-roles.network

If you are interested in other multicast settings, you can take a look here, https://nmstate.io/devel/yaml_api.html#linux-bridge-interface.

[liangwen12year]

@steven-ellis ^^

[steven-ellis]

Thanks @liangwen12year that worked. it would be useful to have an example for setting bridge options.

[liangwen12year]

@steven-ellis , I added the examples in this PR, #742.