[FIX] account: keep original domain in aml's _name_search

Model `account.move.line` has extended `_name_search` to clarify `ilike` search.
However, the new domain replaces original domain, instead of making a friendship.

STEPS:
* add custom Many2one field to any form (e.g. SO)
* add domain for the field, e.g. ` [["parent_state", "!=", "draft"]]`
* try quick search for the new field

opw-3037878

closes odoo/odoo#105534

Signed-off-by: William André (wan) <wan@odoo.com>