[MERGE] stock,mrp,purchase,sale: rescheduling propagation

Currently the fact that the changes in the expected dates are propagated
or not is based on :
- the value of the field propagate on the stock.rule
- the general inventory setting setting use_propagation_minimum_delta

That's not easy to understand for users and difficult to configure.

The purpose of this task is to clarify this configuration (everything is configured
at the same place + but we keep the flexibility by setting this config on the stock.rule)

task-1913401

closes odoo/odoo#33719

Signed-off-by: Simon Lejeune (sle) <sle@openerp.com>