fix: dont update sle values from get_gl_entries

[ankush]

Summary: get_gl_entries is adding average valuation rate when SLE has no stock value difference.

Steps to reproduce:

1. Make sure FIFO is the valuation method. Make ~3 stock receipts; 1 with 0 valuation.
2. Consume material; when 0 valued material is consumed instead the average rate is used to compute value difference.

Fix: Just assume what the stock ledger has done is right and don't try to modify it when making GL entries.

This was added in #7583; now there's no reason to assume that 0 rate is from a bug (and if there is, root cause should be fixed instead of applying average rate)

[codecov]

Codecov Report

Merging #29304 (0272397) into develop (3438e1f) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop   #29304      +/-   ##
===========================================
- Coverage    57.93%   57.92%   -0.02%     
===========================================
  Files         1110     1110              
  Lines        68087    68079       -8     
===========================================
- Hits         39449    39435      -14     
- Misses       28638    28644       +6     

Impacted Files	Coverage Δ
erpnext/controllers/stock_controller.py	90.70% <100.00%> (-0.21%)	⬇️
...eport/item_variant_details/item_variant_details.py	84.33% <0.00%> (-3.62%)	⬇️
erpnext/education/doctype/student/student.py	73.68% <0.00%> (-3.16%)	⬇️
erpnext/stock/report/stock_ledger/stock_ledger.py	75.60% <0.00%> (-2.44%)	⬇️
...ion/doctype/course_enrollment/course_enrollment.py	44.00% <0.00%> (-2.00%)	⬇️
...xt/stock/report/stock_analytics/stock_analytics.py	91.08% <0.00%> (-1.99%)	⬇️
...wise_balance_history/batch_wise_balance_history.py	91.37% <0.00%> (-1.73%)	⬇️
erpnext/stock/reorder_item.py	76.06% <0.00%> (-1.71%)	⬇️
.../report/stock_projected_qty/stock_projected_qty.py	88.15% <0.00%> (-1.32%)	⬇️
erpnext/stock/report/stock_ageing/stock_ageing.py	92.48% <0.00%> (-1.16%)	⬇️
... and 18 more

[rohitwaghchaure]

@Mergifyio backport version-13-hotfix

[mergify]

backport version-13-hotfix

✅ Backports have been created

• #29314 fix: dont update sle values from get_gl_entries (backport #29304) has been created for branch version-13-hotfix