fix: billed amount in delivery note items (backport #29290)

[mergify]

This is an automatic backport of pull request #29290 done by Mergify.
Cherry-pick of fc65a3d has failed:

On branch mergify/bp/develop/pr-29290
Your branch is ahead of 'origin/develop' by 2 commits.
  (use "git push" to publish your local commits)

You are currently cherry-picking commit fc65a3d989.
  (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)

Changes to be committed:
	new file:   erpnext/patches/v13_0/set_billed_amount_in_returned_dn.py

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   erpnext/patches.txt

Cherry-pick of fedeb2a has failed:

On branch mergify/bp/develop/pr-29290
Your branch is ahead of 'origin/develop' by 4 commits.
  (use "git push" to publish your local commits)

You are currently cherry-picking commit fedeb2a70f.
  (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)

Changes to be committed:
	deleted:    erpnext/patches/v13_0/set_billed_amount_in_returned_dn.py

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   erpnext/patches.txt

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

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