[FIX] mrp: Preserve component registration steps on backorder creation

Impacted versions: 15.0

Steps to reproduce (starting from ENTERPRISE 15.2):
- enable Work Orders
- create new BoM for a new product
- add 1 operation w/ 1 step (e.g. Instructions)
- add 1 component to BoM with operation_id (Consumed in Operation) = the operation
- Create and confirm a MO with new BoM + 2 Quantity to Produce
- Produce 1 product via the tablet view flow (i.e. complete instruction step + Validate 1 component in "Register Consumed Materials" step + Mark As Done)

Current behaviour:
Backorder is correctly created, but its workorder is missing the "Register Consumed Materials" step

Expected behaviour:
Step is correctly created

Note: same issue occurs with Byproducts having an operation_id (i.e. "Produced in Operation")

Issue is due to when _split_productions() first creates the backorders, they are created without move_raw_ids and move_finished_ids (see: _get_backorder_mo_vals()). When the backorders are created, they auto-create and auto-confirm their workorders. Since a quality point (e.g. operation step) exists for the workorder, the initial _action_confirm will _create_checks() for the quality point, but the "Register Consumed Materials" steps are created by the operation_id values in the move_raw_ids and move_finished_ids which haven't been set yet. This makes it so when the second _action_confirm() is called on the workorders (i.e. after their moves have been set) at the end of _split_productions(), the _create_checks() will be skipped because it assumes all the quality points have been created since one already exists.

Task: 2800975
Community PR: https://github.com/odoo/odoo/pull/87681
Enterprise PR: https://github.com/odoo/enterprise/pull/26437

closes odoo/odoo#89486

X-original-commit: 67524eb948b7e122f33abf344b28b59bd81eb88d
Related: odoo/enterprise#26534
Signed-off-by: Tiffany Chang <tic@odoo.com>

addons/mrp/models/mrp_production.py

@@ -1551,7 +1551,7 @@ class MrpProduction(models.Model):
                     backorder_sequence=next_seq
                 ))
 
-        backorders = self.env['mrp.production'].create(backorder_vals_list)
+        backorders = self.env['mrp.production'].with_context(skip_confirm=True).create(backorder_vals_list)
 
         index = 0
         production_to_backorders = {}

addons/mrp/models/mrp_workorder.py

@@ -448,6 +448,8 @@ class MrpWorkorder(models.Model):
         # Auto-confirm manually added workorders.
         # We need to go through `_action_confirm` for all workorders of the current productions to
         # make sure the links between them are correct.
+        if self.env.context.get('skip_confirm'):
+            return res
         to_confirm = res.filtered(lambda wo: wo.production_id.state in ("confirmed", "progress", "to_close"))
         to_confirm = to_confirm.production_id.workorder_ids
         to_confirm._action_confirm()