Dynamic resolution on Linux guest is broken

**Describe the issue**

I've just updated UTM to 4.6.3 and since doing that dynamic resolution change in the guest is broken. This worked fine before and spice-vdagent is installed and running.

**Configuration**
* UTM Version: 4.6.3
* macOS Version: 15.1.1
* Mac Chip (Intel, M1, ...): M3

**Debug log**

Inside Linux spice-vdagentd is displaying some seemingly related errors:
```
$ cat /var/log/messages | grep spice-vdagentd
Dec 6 08:28:06 bart-macbook user.info spice-vdagentd: opening vdagent virtio channel
Dec 6 08:28:06 bart-macbook user.debug spice-vdagentd: Set max clipboard: 104857600
Dec 6 08:28:06 bart-macbook user.err spice-vdagentd: invalid message size for VDAgentMonitorsConfig
Dec 6 08:28:06 bart-macbook user.err spice-vdagentd: invalid message size for VDAgentMonitorsConfig
Dec 6 08:28:06 bart-macbook user.debug spice-vdagentd: Set max clipboard: 104857600
Dec 6 08:28:06 bart-macbook user.err spice-vdagentd: invalid message size for VDAgentMonitorsConfig
Dec 6 08:28:09 bart-macbook authpriv.notice sudo: bart : TTY=pts/0 ; PWD=/home/bart ; USER=root ; COMMAND=/usr/sbin/spice-vdagentd --help
Dec 6 08:29:29 bart-macbook user.info spice-vdagentd: closed vdagent virtio channel
Dec 6 08:29:30 bart-macbook user.warn spice-vdagentd: no session info, max 1 session agent allowed
Dec 6 08:29:36 bart-macbook user.info spice-vdagentd: opening vdagent virtio channel
Dec 6 08:29:36 bart-macbook user.debug spice-vdagentd: Set max clipboard: 104857600
Dec 6 08:29:36 bart-macbook user.err spice-vdagentd: invalid message size for VDAgentMonitorsConfig
Dec 6 08:29:36 bart-macbook user.debug spice-vdagentd: Set max clipboard: 104857600
Dec 6 08:29:36 bart-macbook user.err spice-vdagentd: invalid message size for VDAgentMonitorsConfig
Dec 6 08:30:05 bart-macbook user.err spice-vdagentd: invalid message size for VDAgentMonitorsConfig
Dec 6 08:30:09 bart-macbook user.err spice-vdagentd: invalid message size for VDAgentMonitorsConfig
Dec 6 08:30:15 bart-macbook user.err spice-vdagentd: invalid message size for VDAgentMonitorsConfig
```

[qemu-debug.log](https://github.com/user-attachments/files/18034555/qemu-debug.log)