[REF] mrp_subcontracting

This PR modify the subcontracting process:
- Support extra quantity
- No more interaction with the subcontract order. Everything is directly accessible on the operation
- Dropshipping with subcontracting
- Bypass reservation process
- The partner type subcontractor is removed and every partner could be set on the BoM
- Update the initial demand will trigger the rules.
- Demo data
- Subcontractor is required on the BoM (no more BoM for all partners of type subcontractor)

Visually:
- Remove the stat button for linked operation.
- Register Components is only available when a subcontract component is tracked
- Button on operations in order to correct tracked components
- Show Operation button will ask to record components until the total quantity is provided(correction on finish lines are allowed after)

More details available in each commit
Task 1962187

closes odoo/odoo#35738

Signed-off-by: Simon Lejeune (sle) <sle@openerp.com>