Move AI Assistants API to use function calling
>>> [!note] Migrated issue
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<!-- Migrated from issue #3514985. -->
Reported by: [catia_penas](https://www.drupal.org/user/3725216)
Related to !539
>>>
<h3 id="summary-problem-motivation">Description</h3>
<p>Move the Assistants API to making use of function calling and the approach of agents where appropriate (no pre action prompt)</p>
issue