alpine auth.err getty[3453]: tcgetattr: I/O error^M

### Describe the Bug
A clear and concise description of what the bug is.

`/var/log/messages` is spammed with:

```
May 21 13:17:20 alpine auth.err getty[3453]: tcgetattr: I/O error^M
May 21 13:17:30 alpine daemon.info init: process '/sbin/getty -L 0 ttyS0 vt100' (pid 3453) exited. Scheduling for restart.
May 21 13:17:31 alpine daemon.info init: starting pid 3454, tty '/dev/ttyS0': '/sbin/getty -L 0 ttyS0 vt100'
```

Every 10s or so.

### Version

#### Colima Version:

```
colima version development
git commit: unknown

runtime: docker
arch: aarch64
client: v20.10.14
server: v20.10.11
```

What is the output of `colima version`

#### Lima Version:

```
limactl version 0.10.0
```

What is the output of `limactl --version`

#### Qemu Version

What is the output of `qemu-img --version`

```
qemu-img version 7.0.0
Copyright (c) 2003-2022 Fabrice Bellard and the QEMU Project developers
```

### Operating System

- [ ] macOS Intel
- [x] macOS m1
- [ ] Linux

### To Reproduce

Steps to reproduce the behavior:

1. `colima start`
2. `colima ssh -- sudo tail -f /var/log/messages`

### Expected behavior

A clear and concise description of what you expected to happen.

### Additional context

Add any other context about the problem here.

The issue is about a serial console getty error in an Alpine Linux VM managed by Colima. Start by examining the VM configuration in the Colima codebase, likely under the lima VM setup. Look for how ttyS0 is configured and why getty fails with an I/O error. Check the logs via 'colima ssh -- sudo tail -f /var/log/messages' to see the pattern. Understanding Linux serial console setup and the interaction with QEMU is needed.

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