[FIX] crm: do not mark as won a lead
[FIX] crm: do not mark as won a lead

A lead can be marked as won, it must be converted to an opportunity first.
Previous flow was problematic as we could still convert to opportunity a won
lead (which does not work and does not make much sense).
A lead can only be lost or converted.

Fixes #9076

syci/OCB,storm-computers/odoo,hip-odoo/odoo,ygol/odoo,microcom/odoo,Elico-Corp/odoo_OCB,microcom/odoo,laslabs/odoo,ygol/odoo,optima-ict/odoo,bplancher/odoo,Elico-Corp/odoo_OCB,sysadminmatmoz/OCB,storm-computers/odoo,microcom/odoo,sysadminmatmoz/OCB,stephen144/odoo,stephen144/odoo,laslabs/odoo,syci/OCB,sysadminmatmoz/OCB,ygol/odoo,laslabs/odoo,bplancher/odoo,hip-odoo/odoo,storm-computers/odoo,hip-odoo/odoo,laslabs/odoo,microcom/odoo,storm-computers/odoo,storm-computers/odoo,stephen144/odoo,optima-ict/odoo,optima-ict/odoo,bplancher/odoo,laslabs/odoo,laslabs/odoo,ygol/odoo,hip-odoo/odoo,syci/OCB,ygol/odoo,dfang/odoo,Elico-Corp/odoo_OCB,sysadminmatmoz/OCB,dfang/odoo,syci/OCB,syci/OCB,hip-odoo/odoo,ygol/odoo,dfang/odoo,microcom/odoo,stephen144/odoo,hip-odoo/odoo,storm-computers/odoo,sysadminmatmoz/OCB,bplancher/odoo,optima-ict/odoo,syci/OCB,sysadminmatmoz/OCB,dfang/odoo,bplancher/odoo,Elico-Corp/odoo_OCB,bplancher/odoo,Elico-Corp/odoo_OCB,dfang/odoo,dfang/odoo,optima-ict/odoo,stephen144/odoo,microcom/odoo,stephen144/odoo,optima-ict/odoo,Elico-Corp/odoo_OCB,ygol/odoo,sysadminmatmoz/OCB