fix: update payable leave encashment doc handling in full and final statement (backport #2843)

[mergify]

• Add Status and Pay Via Payment Entry filters to Leave Encashment payables in Full and Final Statement
• Update payment status of Leave Encashment doc based on FnF payment status
• Add test

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This is an automatic backport of pull request #2843 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 3589e04 has failed:

On branch mergify/bp/version-15-hotfix/pr-2843
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Unmerged paths:
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	both modified:   hrms/hr/doctype/leave_encashment/test_leave_encashment.py

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