[FIX] mrp: split call to write on stock move

You can, in a production order, change the quantity done of a stock move
raw and change its initial demand ('To Consume' field) in the same
transaction. This can lead to some issue as changing the quantity done
will update the stock move line and changing the initial demand will
unreserve the stock move thus impacting the stock move lines too.

This commit will split the values to update of a stock in move in case
the two fields have to be updated. First the stock move lines, then the
initial demand.

This commit also remove the default_product_uom_qty in the move_raw_ids
fields. This ensure the onchanges do not create/edit any stock move lines
with some reserved quantity.

opw : 2451298

closes odoo/odoo#70975

X-original-commit: e8c1f6b1a3f58b68181bf4d2599bd37efb83b5c7
Signed-off-by: agr-odoo <agr-odoo@users.noreply.github.com>
Signed-off-by: William Henrotin <Whenrow@users.noreply.github.com>