feat(pick list): group items based on item code and warehouse before printing

[DeeMysterio]

Problem:

• Similar items on Pick List locations table aren't grouped before printing when fetched using "Get Items" button.

Changes:

• Added a setting called "Group Same Items" on Pick List under Printing Settings section.
• Grouped items based on item code and warehouse before printing.

Above items grouped based on item code and warehouse:

Printing Settings:

no-docs

[codecov]

Codecov Report

Merging #27809 (b0da6d1) into develop (a87c201) will increase coverage by 0.07%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop   #27809      +/-   ##
===========================================
+ Coverage    55.11%   55.19%   +0.07%     
===========================================
  Files         1255     1255              
  Lines        67889    67915      +26     
===========================================
+ Hits         37420    37485      +65     
+ Misses       30469    30430      -39     

Impacted Files	Coverage Δ
erpnext/stock/doctype/pick_list/pick_list.py	67.00% <100.00%> (+2.35%)	⬆️
...tch_item_expiry_status/batch_item_expiry_status.py	69.81% <0.00%> (-24.53%)	⬇️
...e/asset_value_adjustment/asset_value_adjustment.py	87.80% <0.00%> (-3.66%)	⬇️
erpnext/stock/reorder_item.py	74.57% <0.00%> (-3.39%)	⬇️
.../report/stock_projected_qty/stock_projected_qty.py	87.01% <0.00%> (-2.60%)	⬇️
erpnext/controllers/status_updater.py	85.71% <0.00%> (-1.86%)	⬇️
erpnext/portal/utils.py	30.00% <0.00%> (-1.43%)	⬇️
erpnext/stock/stock_ledger.py	85.71% <0.00%> (-0.55%)	⬇️
erpnext/stock/get_item_details.py	79.38% <0.00%> (-0.47%)	⬇️
erpnext/hr/utils.py	74.29% <0.00%> (-0.41%)	⬇️
... and 20 more

[ankush]

@DeeMysterio please add 1 unit test for this function. Else LGTM.