When overriding an existing controller route, developers can
easily c/p the route definition and call super() in the overridden method
when the route attributes are automatically deducted by odoo from the parent route.
Removing those redefined attributes simplifies the routes definition,
clearly highlighting what's changed by the override.
Also reduces unexpected behavior when modifying the base route without
noticing/considering the redefined attributes in a overridden route,
which overrides the changes made to the base route when the sub-module is installed.
This commit adds a test to catch routes attributes redefinition, and clean existing routes.
closesodoo/odoo#108512
Related: odoo/enterprise#35176
Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>