Fix on printing campaign discounts in receipt (RTP-32770)

When "Do not show campaign discount for items with ID requirements on receipt" is enabled and "Do not show campaign discount on receipt" is not enabled in PrinterConfig, then regular items will have their discounts printed in the receipt and age validated items will not have their discounts printed in the receipt.

Warranty Receipt Printing Update (RTP-28769)

When adding new items to existing orders or processing returns, the warranty receipt now includes only the items that were added. This prevents duplicate receipts from being printed, unlike before when all warranty receipts were printed every time. This ensures clearer and more accurate receipt handling.