Fix search user by email

[AdrienClairembault]

Using this simple CSV file containing users login and emails (imagine real emails instead of **** 😅):

The goal is, for each row, to find the user with the matching email and update its login.

Here is the model we are using:

The import will fail because datainjection doesn't seem to handle users search by email very well:

The query has no chance to succeed as it is looking for a foreign key that doesn't exist (and with an incorrect value - the raw email wouldn't be a valid foreign key anyway):

SELECT * FROM `glpi_users` WHERE 1 AND `is_deleted` = '0' AND `useremails_id`='*****@*****'

The correct query would be:

SELECT * FROM `glpi_users` WHERE 1 AND `is_deleted` = '0' AND `id` IN (
    SELECT `user_id` FROM glpi_useremails WHERE `email` = '*****@*****'
);

To fix this, I've added a specific check for this special case of searching users by email.

Internal ref: !24192