fix: avg. buying amount for product bundle item with serial and batch no in gross profit report

[ljain112]

Issue: Buying Amount for Product Bundle Items is incorrect.

For Product bundle Items, serial_and_batch_bundle was not set and the item code was also incorrect because it was for the parent item.

Steps to Replicate:

• Create an Item with Serial and batch and one more item.
• Create a Product bundle with the same Items.
• Create a sales invoice without update_stock.
• Create a Delivery Note for sales invoice
• Check buying amount in gross profit report.

Frappe Support Issue: https://support.frappe.io/app/hd-ticket/24113

backport version-15-hotfix
backport version-14-hotfix