[FIX] web: avoid having context twice
[FIX] web: avoid having context twice

In case the context was manually passed to report_download, #36839
would pass the context keyword argument twice to report_routes.

That is not allowed in python so we update the current context with the
custom context from the report and pop the custom context from the
arguments

closes odoo/odoo#36989

Signed-off-by: Romain Libert (rli) <d3a53ea3f0d6ebbbf1eb8431093f132bc4577d93@odoo.com>

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo