feat(opening invoice creation tool): add project to opening invoice child row

[ravibharathi656]

Issue:
The Invoices child table in the Opening Invoice Creation Tool does not include the Project field as an accounting dimension. Because of this, users cannot assign a project at row level while creating opening invoices, and the project value cannot be carried into the created invoice item

Ref: #66607

Backport needed: v16, v15

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.75%. Comparing base (25be38e) to head (1513e90).
⚠️ Report is 3 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop   #54662   +/-   ##
========================================
  Coverage    79.75%   79.75%           
========================================
  Files         1160     1160           
  Lines       126446   126448    +2     
========================================
+ Hits        100849   100853    +4     
+ Misses       25597    25595    -2     

Files with missing lines	Coverage Δ
...ice_creation_tool/opening_invoice_creation_tool.py	59.37% <ø> (ø)
...on_tool_item/opening_invoice_creation_tool_item.py	100.00% <ø> (ø)

... and 1 file with indirect coverage changes

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