[enhancement]: wsl datasource - Inherit user from Windows

# Enhancement

On WSL, the user is prompted during installation to create a default user or you can provide it through cloud-init configuration.
The user of the WSL instance is almost always the same user running the session on the Windows host.
We could automatically create a default user in the WSL instance with the login name and properties inherited from the Windows system.

For instance we could add something like:

```
users:
- wsl: inherit|prompt
```

If wsl is not set then it defaults to `prompt`

I'm definitely open to discussion on a better configuration parameter.