Add default value for audio driver

[afbjorklund]

Can now use .audio.device=default similar to .video.display=default

audio:
  device: default
video:
  display: default

You can still pick another driver, such as alsa or oss, if you want.

[afbjorklund]

This probably needs a testing template, as well. If nothing else, you need to add linux-modules-extra and alsa-utils.

I would normally test with mikmod and https://modarchive.org/, but I suppose that part can be left up to the user...

[afbjorklund]

Added example:

 0 - Front Left
 1 - Front Right
Time per period = 3.017038
 0 - Front Left
 1 - Front Right
Time per period = 3.049002

This example uses sudo, since there is not yet a good way to add the user to the "audio" group

• https://github.com/lima-vm/lima/issues/1686