keyboard not working on Plan 9 4th release

## Describe the issue

The keyboard does not work when booting the Plan 9 ISO image (downloaded [here](http://9p.io/plan9/download/plan9.iso.bz2); direct link) for the first time. The OS asks to choose whether to install or boot ([see screenshot](https://user-images.githubusercontent.com/35077726/234056794-6a77684d-04e6-41ca-9fd3-10cf79075d06.png)) but none can be chosen because the keyboard does not work.

Before asking to choose an action to perform, it says

```
Plan 9 from Bell Labsi8042: kbdinit failed
```

I also tried to switch from *Standard PC (Q35 + ICH9, 2009) (alias of pc-935-7.2) (q35)* to *Standard PC (i440FX + PIIX, 1996) (default) (pc-i440fx-7.2)* but the issue persists.

## Configuration

* UTM Version: 4.1.6 (75)
* macOS Version: 13.3.1 (22E261)
* Mac Chip: M2

## Crash log

(no crash)

## Debug log

[debug.log](https://github.com/utmapp/UTM/files/11312420/debug.log)

## Upload VM

[config.plist.zip](https://github.com/utmapp/UTM/files/11312440/config.plist.zip)