Document attachment link calculations have been optimized to reduce unnecessary searches and improve performance. This should make document-related operations feel faster, especially where many attachments are involved, without changing user-facing features.

* Prefetching attachment_ids in sudo allows to limit the scope of the documents search
* Removing the location filter on the document, not worth the performance hit.

Follow-up of

Task-5882406

Forward-Port-Of: odoo/enterprise#127062