Make code pass the gitlab pipeline

Hey! I'll take a look at this!

Resolved cspell and most phpcs issues. I'm unsure how to properly resolve the final issues.

Remaining phpcs issue:

FILE: ...tom/migrate_devel-3458112/src/EventSubscriber/MigrationEventSubscriber.php
--------------------------------------------------------------------------------
FOUND 10 ERRORS AFFECTING 10 LINES
--------------------------------------------------------------------------------
 33 | ERROR | Variable "Source" starts with a capital letter, but only
    |       | $lowerCamelCase or $snake_case is allowed
    |       | (Drupal.NamingConventions.ValidVariableName.LowerStart)
 34 | ERROR | Variable "Destination" starts with a capital letter, but only
    |       | $lowerCamelCase or $snake_case is allowed
    |       | (Drupal.NamingConventions.ValidVariableName.LowerStart)
 43 | ERROR | Variable "Source" starts with a capital letter, but only
    |       | $lowerCamelCase or $snake_case is allowed
    |       | (Drupal.NamingConventions.ValidVariableName.LowerStart)
 47 | ERROR | Variable "Destination" starts with a capital letter, but only
    |       | $lowerCamelCase or $snake_case is allowed
    |       | (Drupal.NamingConventions.ValidVariableName.LowerStart)
 68 | ERROR | Variable "Source" starts with a capital letter, but only
    |       | $lowerCamelCase or $snake_case is allowed
    |       | (Drupal.NamingConventions.ValidVariableName.LowerStart)
 69 | ERROR | Variable "Destination" starts with a capital letter, but only
    |       | $lowerCamelCase or $snake_case is allowed
    |       | (Drupal.NamingConventions.ValidVariableName.LowerStart)
 70 | ERROR | Variable "DestinationIDValues" starts with a capital letter, but
    |       | only $lowerCamelCase or $snake_case is allowed
    |       | (Drupal.NamingConventions.ValidVariableName.LowerStart)
 79 | ERROR | Variable "Source" starts with a capital letter, but only
    |       | $lowerCamelCase or $snake_case is allowed
    |       | (Drupal.NamingConventions.ValidVariableName.LowerStart)
 83 | ERROR | Variable "Destination" starts with a capital letter, but only
    |       | $lowerCamelCase or $snake_case is allowed
    |       | (Drupal.NamingConventions.ValidVariableName.LowerStart)
 87 | ERROR | Variable "DestinationIDValues" starts with a capital letter, but
    |       | only $lowerCamelCase or $snake_case is allowed
    |       | (Drupal.NamingConventions.ValidVariableName.LowerStart)
--------------------------------------------------------------------------------

Remaining phpstan issues:

 ------ --------------------------------------------------------------------- 
  Line   migrate_devel.drush.inc                                              
 ------ --------------------------------------------------------------------- 
  27     Function drush_get_option not found.                                 
         💡 Learn more at https://phpstan.org/user-guide/discovering-symbols  
  55     Access to constant DEBUG on an unknown class Drush\Log\LogLevel.     
         💡 Learn more at https://phpstan.org/user-guide/discovering-symbols  
  112    Access to constant ALERT on an unknown class Drush\Log\LogLevel.     
         💡 Learn more at https://phpstan.org/user-guide/discovering-symbols  
 ------ --------------------------------------------------------------------- 

@batigolix, @NexusNovaz

I've fixed the last MR!6 pipeline issue.
so moving this issue into review.

Thank you!!

I have checked the issue and now its pass all the gitlab pipeline tests.
Moving the ticket to RTBC.

Many thanks to all contributors.

Automatically closed - issue fixed for 2 weeks with no activity.