fix: TypeError: 'float' object is not iterable (backport #41758)

[mergify]

Issue

File "apps/frappe/frappe/core/doctype/report/report.py", line 162, in execute_script_report
    res = self.execute_module(filters)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "apps/frappe/frappe/core/doctype/report/report.py", line 179, in execute_module
    return frappe.get_attr(method_name)(frappe._dict(filters))
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "apps/erpnext/erpnext/stock/report/stock_ledger/stock_ledger.py", line 70, in execute
    batch_balance_dict[sle.batch_no] += sle.actual_qty
TypeError: 'float' object is not iterable
```<hr>This is an automatic backport of pull request #41758 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of cf508ce has failed:

On branch mergify/bp/version-15-hotfix/pr-41758
Your branch is up to date with 'origin/version-15-hotfix'.

You are currently cherry-picking commit cf508ce1ed.
  (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:
	modified:   erpnext/stock/report/stock_ledger/stock_ledger.py

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   erpnext/manufacturing/doctype/bom_creator/bom_creator.py
	both modified:   erpnext/public/js/bom_configurator/bom_configurator.bundle.js

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

[frappe-pr-bot]

🎉 This PR is included in version 15.27.0 🎉

The release is available on GitHub release

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