fix: Gross Profit report totals

[GangaManoj]

Problems

• When the Gross Profit report is Grouped By anything other than Invoice, there are two rows displaying the total values, only one of which is accurate.

• When it's Grouped By Invoice, there is no row displaying the total values.
• The Gross Profit Percentage value in the totals row is incorrect.
• The custom totals row(the first one, the one that's actually right) is not displayed in bold.

Fixes

• Remove the inaccurate totals row.
• Add totals row for the report when Grouped By Invoice.
• Fix incorrect Gross Profit Percentage value in the totals row.
• Display totals row in bold.

Testing Info

1. Open the Gross Profit report.
2. Group by Invoice.
3. Check if it has a Totals row.
4. Now Group By everything else(Item Code, Customer, etc).
5. Confirm that there's only one Totals row and that that row is displayed in bold.
6. Verify that the Gross Profit Percentage displayed in the totals row is constant, irrespective of the value of the Group By filter.

[codecov]

Codecov Report

Merging #28402 (5d8a85d) into develop (d0c240e) will decrease coverage by 0.02%.
The diff coverage is 0.00%.

@@             Coverage Diff             @@
##           develop   #28402      +/-   ##
===========================================
- Coverage    55.27%   55.24%   -0.03%     
===========================================
  Files         1119     1119              
  Lines        66598    66604       +6     
===========================================
- Hits         36811    36796      -15     
- Misses       29787    29808      +21     

Impacted Files	Coverage Δ
...pnext/accounts/report/gross_profit/gross_profit.py	0.00% <0.00%> (ø)
...payroll/doctype/income_tax_slab/income_tax_slab.py	83.33% <0.00%> (-16.67%)	⬇️
...eport/item_variant_details/item_variant_details.py	84.33% <0.00%> (-3.62%)	⬇️
erpnext/assets/doctype/asset/depreciation.py	84.44% <0.00%> (-2.97%)	⬇️
...wise_balance_history/batch_wise_balance_history.py	91.37% <0.00%> (-1.73%)	⬇️
erpnext/stock/report/stock_ledger/stock_ledger.py	75.60% <0.00%> (-1.63%)	⬇️
erpnext/portal/utils.py	28.98% <0.00%> (-1.45%)	⬇️
erpnext/stock/reorder_item.py	76.92% <0.00%> (-0.86%)	⬇️
erpnext/stock/report/stock_ageing/stock_ageing.py	90.51% <0.00%> (-0.73%)	⬇️
...next/accounts/doctype/subscription/subscription.py	81.74% <0.00%> (-0.57%)	⬇️
... and 5 more

[nextchamp-saqib]

@Mergifyio backport version-13-hotfix

[mergify]

backport version-13-hotfix

✅ Backports have been created

• #28480 fix: Gross Profit report totals (backport #28402) has been created for branch version-13-hotfix