krunkit: macOS 27 beta 5 (26A5406e) instance creation error

### Description

I'm attempting to get krunkit running on macOS 27b5 and I keep getting an error. Here's the transcript:
```
$ colima start --vm-type krunkit --mount-type virtiofs --cpus 8 --memory 32 --disk 100
INFO[0000] starting colima
INFO[0000] runtime: docker
INFO[0000] creating and starting ... context=vm
> Terminal is not available, proceeding without opening an editor
> "Failed to set config" error="rpc error: code = Unknown desc = field `mountType` must be `virtiofs` or `reverse-sshfs` for krunkit driver, got `9p`"
> failed to create driver instance: rpc error: code = Unknown desc = field `mountType` must be `virtiofs` or `reverse-sshfs` for krunkit driver, got `9p`
FATA[0000] error starting vm: error at 'creating and starting': exit status 1
```

Here's my colima details: (I'm using the current HEAD on main at the time of this ticket)
```
colima version
colima version HEAD-490420d
git commit: 490420d9b98d2e6a558426bfefaea1bb37b67115

runtime: docker
arch: aarch64
client: v29.7.2
server: v29.5.2
```

Here's the docker CLI version:
```
$ docker --version
Docker version 29.7.2, build a7dcaa6fdb
```

### Version

colima version HEAD-490420d
git commit: 490420d9b98d2e6a558426bfefaea1bb37b67115

runtime: docker
arch: aarch64
client: v29.7.2
server: v29.5.2

### Operating System

- [ ] macOS Intel <= 13 (Ventura)
- [ ] macOS Intel >= 14 (Sonoma)
- [ ] Apple Silicon <= 13 (Ventura)
- [X] Apple Silicon >= 14 (Sonoma)
- [ ] Linux

### Output of `colima status`

FATA[0000] colima is not running

### Reproduction Steps

1. Run `colima start --vm-type krunkit --mount-type virtiofs --cpus 8 --memory 32 --disk 100` on macOS 27b5
2. Watch the errors
3.

### Expected behaviour

I expected the krunkit vm type to work

### Additional context

This directly references #1607