To reproduce
============
- create a purchase order and confirm it
- create a Bill, set its Bill date and Accounting date to different dates
to today
- save it, then choose the created PO in autocomplete field
the Accounting day will be changed to today

Problem
=======
when calling the autocomplete, some values will be updated on the record,
where `move_type` is one of them, and updating this field will trigger the
compute of accounting date.

Solution
========
if the value of `move_type` on the record is the same as the one of the update,
it should not be taken into account which will avoid uneeded recompute.

opw-3381530

closes odoo/odoo#132841

Signed-off-by: William Henrotin (whe) <whe@odoo.com>