WIP: add :targeted_{countries,industries} to Actor

[frenchy64]

XDR-2098

[michaels-den]

Let's us 3166-1 A2 codes, ie 2-letter country codes, see the following example:

  "[APT38](https://attack.mitre.org/groups/G0082) is a North Korean state-sponsored     
threat group that specializes in financial cyber operations; it has been attributed to  
the Reconnaissance General Bureau.(Citation: CISA AA20-239A BeagleBoyz August 2020)     
Active since at least 2014, [APT38](https://attack.mitre.org/groups/G0082) has targeted 
banks, financial institutions, casinos, cryptocurrency exchanges, SWIFT system          
endpoints, and ATMs in at least 38 countries worldwide. Significant operations include  
the 2016 Bank of Bangladesh heist, during which                                         
[APT38](https://attack.mitre.org/groups/G0082) stole $81 million, as well as attacks    
against Bancomext (2018) and Banco de Chile (2018); some of their attacks have been     
destructive.(Citation: CISA AA20-239A BeagleBoyz August 2020)(Citation: FireEye APT38   
Oct 2018)(Citation: DOJ North Korea Indictment Feb 2021)(Citation: Kaspersky Lazarus    
Under The Hood Blog 2017)\n\nNorth Korean group definitions are known to have           
significant overlap, and some security researchers report all North Korean              
state-sponsored cyber activity under the name [Lazarus                                  
Group](https://attack.mitre.org/groups/G0032) instead of tracking clusters or           
subgroups.",                                                                            
  :aliases                                                                              
  ["APT38"                                                                              
   "NICKEL GLADSTONE"                                                                   
   "BeagleBoyz"                                                                         
   "Bluenoroff"                                                                         
   "Stardust Chollima"],                                                                
  :external_references                                                                  
  {:external_id "G0082",                                                                
   :source_name "mitre-attack",                                                         
   :url "https://attack.mitre.org/groups/G0082"},                                       
  :mitre_group_id "G0082",                                                              
  :targeted_industries ["financial-services", "government"]                             
  :targeted_countries ["BD", "MX", "CL"]}