fix: remove trusted zone from libvirt network bridge

The zone='trusted' attribute on the integration network bridge
requires firewalld's D-Bus interface to be ready when the network
starts. Since firewalld 2.4.1 removed Type=dbus from its systemd
unit, this causes a race condition. NAT networking between host and
VM works without the zone override, so remove it.

Assisted-by: Claude Opus 4.6 <noreply@anthropic.com>

Signed-off-by: Paul Whalen <pwhalen@fedoraproject.org>

Author: Paul Whalen

tests/greenboot-bootc-anaconda-iso.sh

@@ -149,7 +149,7 @@ sudo tee /tmp/integration.xml > /dev/null << EOF
       <port start='1024' end='65535'/>
     </nat>
   </forward>
-  <bridge name='integration' zone='trusted' stp='on' delay='0'/>
+  <bridge name='integration' stp='on' delay='0'/>
   <mac address='52:54:00:36:46:ef'/>
   <ip address='192.168.100.1' netmask='255.255.255.0'>
     <dhcp>

tests/greenboot-bootc-qcow2.sh

@@ -149,7 +149,7 @@ sudo tee /tmp/integration.xml > /dev/null << EOF
       <port start='1024' end='65535'/>
     </nat>
   </forward>
-  <bridge name='integration' zone='trusted' stp='on' delay='0'/>
+  <bridge name='integration' stp='on' delay='0'/>
   <mac address='52:54:00:36:46:ef'/>
   <ip address='192.168.100.1' netmask='255.255.255.0'>
     <dhcp>

tests/greenboot-ostree.sh

@@ -171,7 +171,7 @@ sudo tee /tmp/integration.xml > /dev/null << EOF
       <port start='1024' end='65535'/>
     </nat>
   </forward>
-  <bridge name='integration' zone='trusted' stp='on' delay='0'/>
+  <bridge name='integration' stp='on' delay='0'/>
   <mac address='52:54:00:36:46:ef'/>
   <ip address='192.168.100.1' netmask='255.255.255.0'>
     <dhcp>