This commit fixes issues that could happen when a groupBy is present
in the load params from the ActivityModel. Before the rewrite of the
view to Owl, this code was present but was forgotten. This causes
crashes whenever web_search_read is then called, leading to undefined
record in the template, and crashing the view.
Now, the groupBy param (if present) is replaced by an empty array.
A test has been added to verify that during the load, even if the
ActivityModel has received a groupBy in its load parameters.
closesodoo/odoo#124215
X-original-commit: b6fa8ec174f5467baaed32b0c12acd0224757281
Signed-off-by: Dardenne Florent (dafl) <dafl@odoo.com>