[FIX] stock: reserve consumables

The original issue is the following:
- Configure the warehouse in Pick + Ship
- Activate the packs
- Create a SO with a product which is a consumable
- In the picking from stock to out, add the product in a package, and
  validate.
- In the picking from out to customer, the previously created package is
  not accessible/propagated as it would be with a stockable product.

The core of the issue is that there are no quants reserved for a move
linked to a consumable product. Since the package information is stored
on the quant, the package cannot be propagated correctly.

The fix is therefore to add the quants reservation feature on consumable
products, but only if the move is propagated from another one (i.e. the
move has ancestors).

That solved our issue, but also makes the workflow more logical. Without
the fix, all pickings are "Available" when created, even though one is
linked to another.

opw-702632

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