[FIX] mrp: workorders of sub-BOMs
[FIX] mrp: workorders of sub-BOMs

- Create the following BOM structure:
```
  Prod 1 (Manufacture)
  |
  --- Prod 2
      Prod 3 (Kit)
      |
      --- Prod 4
	  Prod 5
```
- The BOMs for Prod 1 & 3 must have a routing set, to generate
  workorders
- Create a MO for 1 unit of Prod 1, process to the end

2 units of Prod 1 are created instead of 1.

This is due to the WO for Prod 3 not having a `next_work_order_id`.
Therefore, `record_production` adds an extra quantity at:
```
production_move.quantity_done += self.qty_producing
```

To prevent this, we set as `next_work_order_id` of the BOM of Prod 3 the
WO of Prod 1.

Closes #19527
opw-1817398

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo