`is_view_active` relies on the `website` specified in the context.
This commit turns `is_view_active` to a model method, to avoid that its
callers think the `website` on which it is called is the one used.
closesodoo/odoo#103126
X-original-commit: 52d436706bf650bb14f2bc2a398d107ff99f81ea
Signed-off-by: Romain Derie (rde) <rde@odoo.com>