When the "pre fill lot/serial numbers in shopfloor" setting is enabled on the manufacturing operation type, by-products tracked by serial number were incorrectly showing extra empty lines in shopfloor MO cards (both in overview and work center views).

Steps to reproduce:
1. Create a bill of materials for a final product
2. Add a consumable component
3. Create an operation without steps
4. Add a by-product tracked by serial number
5. Specify that the by-product is produced in the operation above
6. In Inventory > Configuration > Operations Types, open the Manufacturing operation type, go to the Traceability section and enable "Pre fill lot/serial numbers in shop floor moves"
7. Create a manufacturing order for the BOM and confirm it
8. Open the Shop Floor view from the MO
9. Observe the extra line for the by-product in both overview and work center views

Root cause:
The visibleMoveLines getter in stock_move.js was showing ALL move lines (including unpicked ones) when picking_type_prefill_shop_floor_lots was enabled, without distinguishing between raw materials/components and by-products. By-products should never show pre-filled lines since users must register them manually by clicking the + button.

Solution:
Modified the visibleMoveLines getter to always filter by-products to show only picked move lines, regardless of the prefill_shop_floor_lots setting. This ensures by-products only display lines that have been explicitly registered by the user, while regular components continue to show pre-filled lines when the setting is enabled.

Task-5431295

Forward-Port-Of: odoo/enterprise#109761
Forward-Port-Of: odoo/enterprise#103260