This test ensures that method `Callbacks.run` is re-entrant, i.e., it
can be called from a callback being run. The behavior is to execute the
remaining callbacks, and then resume the current one.
This completes https://github.com/odoo/odoo/pull/57469.
closesodoo/odoo#57778
X-original-commit: 7de434ebc091c4d85615c6cf69240e07b98fe767
Signed-off-by: Raphael Collet (rco) <rco@openerp.com>