[Enhancement] Tax Withholding Category (#15064)

* add single, cumulative threshold, remove checkboxes

* remove tds child table from supplier & add tds link field

* add description field in tax withholding category

* add tax withholding data for indian setup, some fixes

* add a checkbox for tax withholding in purchase invoice

* remove supplier's child table for tds

* enable tds field if supplier has tds set inits master

* move rates data to child table - adding fiscal year support

* change bootstrap data according to child table config of tds

* show category name in list view

* loyalty program fixes

* moved tax calculation to tax_withholding.py
- calculation for tds amount for cumulative threshold from gl entry

* add fiscal year dependency in company test

* minor loyalty program fix

* minor tier calculation fix

* minor handling duplicate exception

* toggle apply_tds according to supplier, code rectify

* minor fixes for loyalty program

* test case for single and cumulative threshold

* codacy fix

erpnext/public/js/utils/party.js

@@ -42,6 +42,7 @@ erpnext.utils.get_party_details = function(frm, method, args, callback) {
 		args: args,
 		callback: function(r) {
 			if(r.message) {
+				frm.supplier_tds = r.message.supplier_tds;
 				frm.updating_party_details = true;
 				frappe.run_serially([
 					() => frm.set_value(r.message),