fix: refactor query inget_total_allocated_amount in bank_transaction (backport #44787)

[mergify]

Issue: https://support.frappe.io/app/hd-ticket/26093

Before:

After:

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This is an automatic backport of pull request #44787 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 6b847cd has failed:

On branch mergify/bp/version-14-hotfix/pr-44787
Your branch is up to date with 'origin/version-14-hotfix'.

You are currently cherry-picking commit 6b847cdb62.
  (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:   erpnext/accounts/doctype/bank_reconciliation_tool/bank_reconciliation_tool.py
	both modified:   erpnext/accounts/doctype/bank_transaction/bank_transaction.py

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

Cherry-pick of 2ce0786 has failed:

On branch mergify/bp/version-14-hotfix/pr-44787
Your branch is ahead of 'origin/version-14-hotfix' by 1 commit.
  (use "git push" to publish your local commits)

You are currently cherry-picking commit 2ce07865d3.
  (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:   erpnext/accounts/doctype/bank_reconciliation_tool/bank_reconciliation_tool.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