The createMessageComponent helper was used during tests to mount a message component 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 so that the message component can be mounted in its real environment. closes odoo/odoo#94243 Related: odoo/enterprise#28720 Signed-off-by: Sébastien Theys (seb) <seb@odoo.com>