fix: modify voucher type based on account type (backport #3842)

[mergify]

Incorrect voucher_type assignment

Payroll Entry was always creating Journal Entries with voucher_type = "Bank Entry" even when the selected payment_account is a Cash account.
The updated logic checks the account_type of payment_account and sets the voucher_type accordingly (Bank Entry for bank accounts, Cash Entry for cash accounts).

backport version-15-hotfix
backport version-16-hotfix

Summary by CodeRabbit

• Bug Fixes

  • Payroll now recognizes both bank and cash payment entries when linking transactions, ensuring payments are correctly associated.
  • Payment handling selects the appropriate entry type (bank vs. cash) dynamically based on the payment account’s configuration.

• Tests

  • Test coverage updated to validate multi-method payment aggregation and selection logic.

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This is an automatic backport of pull request #3842 done by [Mergify](https://mergify.com).

[frappe-pr-bot]

🎉 This PR is included in version 15.58.5 🎉

The release is available on GitHub release

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