Fix - Do not generate a consumable model per received consumable

[RomainLvr]

Checklist before requesting a review

Please delete options that are not relevant.

• I have performed a self-review of my code.
• I have added tests (when available) that prove my fix is effective or that my feature works.
• I have updated the CHANGELOG with a short functional description of the fix or new feature.
• This change requires a documentation update.

Description

• It fixes !46474
• Here is a brief description of what this PR does

When automatic asset generation on delivery is enabled, receiving a consumable reference creates a new consumable model (A_COMPLETER…) for each received unit.

When the delivered lines are then linked to the real consumable model, a new consumable is created in that model. The generated models stay behind with no link to the order.

Fix

ConsumableItem is added to PluginOrderLink::getTypesThanCannotBeGenerated(), so consumables are handled the same way as cartridges:

• no consumable model is generated on delivery
• the delivered line stays unlinked until it is linked to an existing consumable model
• a line that is already linked can no longer be linked again without unlinking it first