[GOVCMSD10-1163] Fix local mysql import error

[jackwrfuller]

The Simplesamlphp and drupal database tables use different collations.

Simplesaml uses utf8mb4_0900_ai_ci but drupal uses utf8mb4_general_ci.

This causes errors in local test sites when attempting to import lagoon database backups to a local site. In particular, the following error is received:

ahoy mysql-import ~/Downloads/vanilla-govcms-10-beta-test-mariadb-prebackuppod.mariadb.sql

Do you really want to drop all tables in the database drupal? (yes/no) [yes]:
> yes

> ERROR 1273 (HY000) at line 25: Unknown collation: 'utf8mb4_0900_ai_ci'

In Process.php line 270:

  The command "mysql --defaults-file=/tmp/drush_ONjodh --database=drupal --ho  
  st=mariadb --port=3306 -A" failed.                                           

  Exit Code: 1(General error)                                                  

  Working directory: /app/web                                                  

  Output:                                                                      
  ================                                                             

  Error Output:                                                                
  ================                                                             
  ERROR 1273 (HY000) at line 25: Unknown collation: 'utf8mb4_0900_ai_ci'

The change I propose to fix this is to explicitly tell simplesamlphp to use the utf8mb4_general_ci collation.