The createChatterContainer helper was used during tests to mount a chatter container and test it. However, this approach is not very realistic and blocks some waiting PRs. In order to get closer from the reality, let's mount a webClient and open a form view containing a chatter. closes odoo/odoo#94175 Related: odoo/enterprise#28684 Signed-off-by: Sébastien Theys (seb) <seb@odoo.com>