test: fix test cases and related valiation for invalid item tax tempate

[vorasmit]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.16%. Comparing base (1abb2db) to head (5f16ec2).
Report is 43 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2825      +/-   ##
===========================================
+ Coverage    59.95%   60.16%   +0.21%     
===========================================
  Files          122      122              
  Lines        11972    12000      +28     
===========================================
+ Hits          7178     7220      +42     
+ Misses        4794     4780      -14     

Files with missing lines	Coverage Δ
...ndia_compliance/gst_india/overrides/transaction.py	88.01% <100.00%> (-0.33%)	⬇️
india_compliance/gst_india/utils/__init__.py	76.79% <100.00%> (+0.21%)	⬆️

... and 2 files with indirect coverage changes