search option: fix negative conditions

[MyvTsv]

Checklist before requesting a review

Please delete options that are not relevant.

• I have read the CONTRIBUTING document.
• I have performed a self-review of my code.
• I have added tests that prove my fix is effective or that my feature works.
• This change requires a documentation update.

Description

• Complete this PR : Search engine: fix negative conditions on linked children #13684

If I use the instruction
use_subquery' => true
in the configuration of a search option for a table storing a relationship "itemtype" and "items_id", this generates this error :

In the example, I try to retrieve all tickets that do not contain a tag from the tag plugin.

This PR complements this PR: pluginsGLPI/tag#230

[stonebuzz]

Unit tests now need to be implemented.

I know that there are tests that verify the SQL query generated by GLPI (I don't remember exactly where). You should be able to rely on them to create a test that, based on search criteria, generates an SQL query that you will then need to validate.