[FIX] stock_zebra: display lot in picking report
[FIX] stock_zebra: display lot in picking report

On picking "Barcodes (ZPL)" report, we show barcode of product for
untracked product, and barcode of lot if available.

But if we use an existing lot, we have to use lot_id.name to get the lot
name instead of lot_name (used in configuration with new lot only) or
lot will not be shown in the report.

opw-2036894
closes #34958

Signed-off-by: Nicolas Lempereur (nle) <2907e499a003d1c3ab7944c0a40c6df46e3e3c2f@odoo.com>
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo