Let's assume the following scenario:
- be on a list or kanban view with sample data
- click on "Create" (-> opens the form view)
- in the form view, there's a kanban x2many field
Before this commit, the no content helper was displayed in the
form view, whereas it obviously should not.
The issue occurred since [1], as this commit has the unwanted
since effect to set the property `useSampleModel` to true on the
form view model, which is used in the x2many kanban renderer to
determine whether or not to display the no content helper.
This commit forces that property to `false` on views that
explicitely ask to ignore sample data.
[1] 2600d1f2aeclosesodoo/odoo#99889
Signed-off-by: Mathieu Duckerts-Antoine <dam@odoo.com>