fix: do not include advances for tds vouchers

[ljain112]

Issue: TDS is getting deducted even though the threshold has not been breached.

Steps To Replicate:

• Create a Journal Entry for the supplier by debiting the supplier account and crediting tds account.
• Now create a purchase invoice with apply_tds enabled and tds_category.
• TDS will get deducted even though the threshold has not been breached.

Solution:
Only include vouchers with the same tax_withholding_category for checking if tds is deducted earlier.

Notes :

• Since we are already checking for payment entry separately advances will be checked automatically.
• Advances are still required for TCS(sales workflow) because tax_withholding_category field is not present in sales invoice.

Frappe Support Issue: https://support.frappe.io/helpdesk/tickets/17255