fix: tax category field in tax withholding details report

[GursheenK]

Changes

• Removed tax_withholding_category from common fields since Sales Invoice does not have the field.
• Added a test to Tax Withholding Details report to catch such common bugs.

no-docs

[codecov]

Codecov Report

Merging #36974 (175870c) into develop (d2f03c8) will increase coverage by 0.19%.
Report is 4 commits behind head on develop.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop   #36974      +/-   ##
===========================================
+ Coverage    65.55%   65.74%   +0.19%     
===========================================
  Files          796      796              
  Lines        62719    62730      +11     
===========================================
+ Hits         41115    41244     +129     
+ Misses       21604    21486     -118     

Files Changed	Coverage
...tax_withholding_details/tax_withholding_details.py	100.00%