feat: Add check list /etc/ssh/sshd_config.d/*

AWS have separate file `/etc/ssh/sshd_config.d/60-cloudimg-settings.conf` with only one config line:
```
$ cat /etc/ssh/sshd_config.d/60-cloudimg-settings.conf
PasswordAuthentication no
$
```

I get this issue when try config password auth on my AWS and then find solution on this page
https://superuser.com/questions/1783398/ssh-does-not-allow-password-authentication