fix: show tax withholding category details for customers

[GursheenK]

Problem

• The TDS Payable Monthly Report fetches tax details of both Purchase Invoices and Sales Invoices. However, the party details and total amount(without tax) of only purchase invoices is displayed correctly.
• The results can only be filtered by Supplier.

Solution

• Added logic to fetch and show Customer details and the total amount(without tax) for Sales Invoices.
• Added a mandatory filter for Party Type which allows filtering results for both Suppliers and Customers.

[codecov]

Codecov Report

Merging #36196 (5224f13) into develop (3055430) will decrease coverage by 0.04%.
The diff coverage is 0.00%.

❗ Current head 5224f13 differs from pull request most recent head 8c410c6. Consider uploading reports for the commit 8c410c6 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #36196      +/-   ##
===========================================
- Coverage    64.14%   64.11%   -0.04%     
===========================================
  Files          785      784       -1     
  Lines        60749    60757       +8     
===========================================
- Hits         38970    38954      -16     
- Misses       21779    21803      +24     

Files Changed	Coverage Δ
...tax_withholding_details/tax_withholding_details.py	0.00% <0.00%> (ø)

... and 8 files with indirect coverage changes

[deepeshgarg007]

Set the default value as "Supplier"

[barredterra]

Can we move this to [post_model_sync]? Seems to break my migration otherwise (rename_doc triggers a query on tabDocType.is_virtual, which does not exists at that time).