This commit introduces a new pick type used when dropshipping subcontractors,
specifically when the PO resupply relies on the dropship mechanism
this is done by using it for the rules of the `Dropship subcontractor on order` route
Part-of: odoo/odoo#95770
Added 'Dropship Subcontractor on Order' route to simplify user interaction
and stay tuned with 'Resupply Subcontractor on Order'.
Task: 2444742
Part-of: odoo/odoo#71732