Improve the returns process by adding the following improvements: - Removal of the 'return' operations type. Returns of deliveries now become receipts. - Update of the `stock_picking_return` wizard by removing the onchange on picking_id. - Show returns in the sale portal, with a new 'return label' PDF report - Enable returns for multi-step receipts on purchases Community PR: https://github.com/odoo/odoo/pull/118568 Enterprise PR: https://github.com/odoo/enterprise/pull/39761 closes odoo/odoo#118568 Task: 3081370 Related: odoo/upgrade#4660 Related: odoo/enterprise#39761 Signed-off-by: Tiffany Chang <tic@odoo.com>