Description of problem:
Update the interface trustGuestRxFilters and backend setting return succeed but no changes

Version-Release number of selected component (if applicable):
libvirt-8.5.0-1.el9.x86_64

How reproducible:
100%

Steps to Reproduce:
1. Start a vm with direct type interface as below:

1. virsh start vm2
   Domain 'vm2' started
2. virsh dumpxml vm2 | grep /interface -B7
   <interface type='direct' trustGuestRxFilters='yes'>
   <mac address='52:54:00:65:52:cb'/>
   <source dev='eno2' mode='bridge'/>
   <target dev='macvtap0'/>
   <model type='virtio'/>
   <alias name='net0'/>
   <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
   </interface>
   2. update the trustGuestRxFilters setting from "yes" to "no" by update-device:
3. cat direct.xml
   <interface type='direct' trustGuestRxFilters='no'>
   <mac address='52:54:00:65:52:cb'/>
   <source dev='eno2' mode='bridge'/>
   <target dev='macvtap0'/>
   <model type='virtio'/>
   <alias name='net0'/>
   <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
   </interface>
4. virsh update-device vm2 direct.xml
   Device updated successfully

3. the update-device command succeed, but the live xml do not changes:

1. virsh dumpxml vm2 | grep /interface -B7
   <interface type='direct' trustGuestRxFilters='yes'>
   <mac address='52:54:00:65:52:cb'/>
   <source dev='eno2' mode='bridge'/>
   <target dev='macvtap0'/>
   <model type='virtio'/>
   <alias name='net0'/>
   <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
   </interface>

Another scenario for backend:

1. virsh dumpxml vm2 | grep /interface -B8
   <interface type='network'>
   <mac address='52:54:00:cf:af:c6'/>
   <source network='default' portid='1c06f82e-fa6c-4de9-9cac-8973b1db1eec' bridge='virbr0'/>
   <target dev='vnet1'/>
   <model type='virtio'/>
   <backend tap='/dev/net/tun' vhost='/dev/vhost-net'/>
   <alias name='net0'/>
   <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
   </interface>
2. cat backend.xml
   <interface type='network'>
   <mac address='52:54:00:cf:af:c6'/>
   <source network='default' portid='1c06f82e-fa6c-4de9-9cac-8973b1db1eec' bridge='virbr0'/>
   <target dev='vnet1'/>
   <model type='virtio'/>
   <backend tap='/dev/net/tun1' vhost='/dev/vhost-net2'/>
   <alias name='net0'/>
   <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
   </interface>
3. virsh update-device vm2 backend.xml
   Device updated successfully
4. virsh dumpxml vm2 | grep backend
   <backend tap='/dev/net/tun' vhost='/dev/vhost-net'/>

Actual results:
Use update-device to update trustGuestRxFilters attribute or backend elements, the command returns succeed, but the live xml does not update accordingly.

Expected results:
libvirt should return unsupported error if such elements can not be live updated

Additional info: