fix: Multiple fixes in Bank Statement Import (backport #42026)

[mergify]

Fixes for consistency with data import tool in frappe

• Custom Delimitor (consistency with frappe)
• Deprecated statement_import_log
• Use Data Import Log for import_status, Import Log preview

Backport:

• version-15
• version-14

Closes: #42017
Frappe Support Issue: https://support.frappe.io/helpdesk/tickets/17549

Before:

After:

---

This is an automatic backport of pull request #42026 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 13fb560 has failed:

On branch mergify/bp/version-15-hotfix/pr-42026
Your branch is up to date with 'origin/version-15-hotfix'.

You are currently cherry-picking commit 13fb560401.
  (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/accounts/doctype/bank_statement_import/bank_statement_import.py

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   erpnext/accounts/doctype/bank_statement_import/bank_statement_import.json

Cherry-pick of b202409 has failed:

On branch mergify/bp/version-15-hotfix/pr-42026
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 b202409428.
  (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/accounts/doctype/bank_statement_import/bank_statement_import.py

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   erpnext/accounts/doctype/bank_statement_import/bank_statement_import.json

Cherry-pick of 98ad01c has failed:

On branch mergify/bp/version-15-hotfix/pr-42026
Your branch is ahead of 'origin/version-15-hotfix' by 5 commits.
  (use "git push" to publish your local commits)

You are currently cherry-picking commit 98ad01c736.
  (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_statement_import/bank_statement_import.json

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

[frappe-pr-bot]

🎉 This issue has been resolved in version 15.29.3 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀