chore: test creation of leave ledger entries depending on leave type while encashing leaves (backport #2633)

[mergify]

Added tests for #2614
(Yes, I shoulda added them along with the PR)

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This is an automatic backport of pull request #2633 done by Mergify.

[mergify]

Cherry-pick of acd618f has failed:

On branch mergify/bp/version-15-hotfix/pr-2633
Your branch is up to date with 'origin/version-15-hotfix'.

You are currently cherry-picking commit acd618f8.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   hrms/hr/doctype/leave_encashment/leave_encashment.py

no changes added to commit (use "git add" and/or "git commit -a")

Cherry-pick of de06a25 has failed:

On branch mergify/bp/version-15-hotfix/pr-2633
Your branch is ahead of 'origin/version-15-hotfix' by 1 commit.
  (use "git push" to publish your local commits)

You are currently cherry-picking commit de06a25a.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   hrms/hr/doctype/leave_encashment/leave_encashment.py

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally