fix: Add extra column to display Invoice or Item when grouped by Invoice

[GangaManoj]

Problem:

The Gross Profit report uses a variable called parent to represent Sales Invoices. While modifying the report to accommodate Product Bundles in #27124, I'd modified the parent variable to represent either the name of the Invoice or the Item Code. However, this seems to have caused a problem with the calculation of Buying Amounts.

Fix:

• Undo the changes made to parent
• Replace the parent column with a new column called invoice_or_item to display the items included in an Invoice in tree form.

Testing Info

1. Open the Gross Profit Report.
2. Group by Invoice.
3. Check if the Sales Invoice column still displays all the Invoices and their Items in tree form.

[codecov]

Codecov Report

Merging #28380 (ecc2e79) into develop (293f6cb) will increase coverage by 0.04%.
The diff coverage is 48.50%.

@@             Coverage Diff             @@
##           develop   #28380      +/-   ##
===========================================
+ Coverage    55.24%   55.28%   +0.04%     
===========================================
  Files         1119     1119              
  Lines        66568    66598      +30     
===========================================
+ Hits         36775    36819      +44     
+ Misses       29793    29779      -14     

Impacted Files	Coverage Δ
...nk_reconciliation_tool/bank_reconciliation_tool.py	44.11% <0.00%> (ø)
...xt/accounts/doctype/sales_invoice/sales_invoice.py	78.81% <ø> (ø)
erpnext/accounts/report/financial_statements.py	29.65% <ø> (ø)
...pnext/accounts/report/gross_profit/gross_profit.py	0.00% <0.00%> (ø)
erpnext/crm/doctype/competitor/competitor.py	0.00% <0.00%> (ø)
..._integrations/connectors/woocommerce_connection.py	76.92% <ø> (ø)
...rations/doctype/taxjar_settings/taxjar_settings.py	28.33% <ø> (ø)
erpnext/erpnext_integrations/utils.py	42.22% <ø> (ø)
.../payroll/report/salary_register/salary_register.py	0.00% <0.00%> (ø)
erpnext/regional/report/gstr_1/gstr_1.py	0.00% <0.00%> (ø)
... and 83 more

[nextchamp-saqib]

@Mergifyio backport version-13-hotfix

[mergify]

backport version-13-hotfix

🟠 Waiting for conditions to match

• merged [:pushpin: backport requirement]

[mergify]

backport version-13-hotfix

✅ Backports have been created

• #28483 fix: Add extra column to display Invoice or Item when grouped by Invoice (backport #28380) has been created for branch version-13-hotfix