[FIX] mrp: delay_alert and manufacturing order

When a manufacturing order was created through a stock rule, the `delay_alert`
feature was broken. Indeed, we should store on the order the `delay_alert` value
similar to what we do with the `propagate_date`, `propagate_date_minimum_delta`
and `propagate_cancel` fields.

We thus add the missing field and add the values in the multiple prepare methods.
We also the missing values for `propagate_date_minimum_delta` and `propagate_date`
in `_get_move_raw_values`.

task-2154781

closes odoo/odoo#42032

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