nixos i18n.consoleFont: choose a different default

Distros often choose Terminus as the default, and it supports some
non-ASCII characters that we use in config. Fixes #8107.

nixos/modules/config/i18n.nix

···
 
       consoleFont = mkOption {
         type = types.str;
-        default = "lat9w-16";
+        default = "Lat2-Terminus16";
         example = "LatArCyrHeb-16";
         description = ''
           The font used for the virtual consoles.  Leave empty to use

nixos/modules/installer/tools/nixos-generate-config.pl

···
 
   # Select internationalisation properties.
   # i18n = {
-  #   consoleFont = "lat9w-16";
+  #   consoleFont = "Lat2-Terminus16";
   #   consoleKeyMap = "us";
   #   defaultLocale = "en_US.UTF-8";
   # };