Before this commit, all url of channel were using `web.base.url` instead of the
current website domain.
Fixes #32348
The override of `get_base_url` method should not be forward ported after
saas-12.4 as since saas-12.5 it is now a model method (f727cd2645).
closes odoo/odoo#34421
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>
Co-authored-by: qsm-odoo <qsm@odoo.com>