[FIX] mrp: unlink workorder lines in post_inventory()

Posting intermediate inventory in a manufacturing order using workorder
need to delete all the remaining workorder lines.
The post_inventory method create new raw moves for the remaining quantities
then reserve those quantities. The reservation will create new workorder lines

If the old workorder lines are not purged, the workorder will be asked to produced
too much.

closes odoo/odoo#32948

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

addons/mrp/models/mrp_production.py

@@ -823,6 +823,8 @@ class MrpProduction(models.Model):
             order._cal_price(moves_to_do)
             moves_to_finish = order.move_finished_ids.filtered(lambda x: x.state not in ('done', 'cancel'))
             moves_to_finish = moves_to_finish._action_done()
+            order.workorder_ids.mapped('raw_workorder_line_ids').unlink()
+            order.workorder_ids.mapped('finished_workorder_line_ids').unlink()
             order.action_assign()
             consume_move_lines = moves_to_do.mapped('move_line_ids')
             for moveline in moves_to_finish.mapped('move_line_ids'):