Add a zone option to disable/enable interzone forwarding

Hello,

firewalld introduced interzone forwarding back in 2020: https://firewalld.org/2020/04/intra-zone-forwarding

The default has changed from disabled to enabled: firewalld/firewalld@46d9141

But the module is not allowing to set this for the zones, adding an option to disable this seems a must

Module version: 5.0.0