fix: Debit and Credit mismatch on transaction currency debit and credit values (backport #46064)

[mergify]

Issue

Debit and Credit values in Transaction currency have a slight mismatch on high precision exchange rates. This is un-fixable on the current approach.

Solution

Instead of calculating Transaction Debit and Credit from base currency, use values directly from parent document.

todo:

• doctype specific logic for:
  • purchase invoice
  • sales invoice
  • journal entry
  • payment entry
• use common method of remaining ones

  ---

  This is an automatic backport of pull request fix: Debit and Credit mismatch on transaction currency debit and credit values #46064 done by Mergify.

[mergify]

Cherry-pick of 3e292ef has failed:

On branch mergify/bp/version-15/pr-46064
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	both modified:   erpnext/accounts/doctype/sales_invoice/sales_invoice.py

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