[FIX] web: missing context during resequence

Problem 1: The context was not passed when calling the resequence function.
Problem 2: Also, the subsequent read operation did not pass the full
context, but only the context of the user, not the context of the action.
A test has been added for the basic model to check that the context is properly
given after a resequence.

closes odoo/odoo#81393

Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>