[FIX] l10n_be: translate Belgian tax report

The Belgian tax report was only available in French.
Now the tax report is available in English by default and there are official translations in Dutch and French.

Resources:
NL: https://financien.belgium.be/sites/default/files/downloads/165-625-formulier-2022.pdf
FR: https://finances.belgium.be/sites/default/files/downloads/165-625-formulaire-2022.pdf

[task-3074748](https://www.odoo.com/web#id=3074748&cids=1&menu_id=4720&action=4043&model=project.task&view_type=form

)

closes odoo/odoo#106258

Signed-off-by: Josse Colpaert <jco@odoo.com>