fix: link cash flow rows and fix summary linking (backport #42524)

[mergify]

Context

• Cashflow rows link into nowhere useful
• Summary lines ditto

Solutions

• Avoid linking summary lines (through consequent quoting)
• Link cashflow lines to GL report with the filter set to each row's (multiple) its constituent accounts

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This is an automatic backport of pull request #42524 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of b94af28 has failed:

On branch mergify/bp/version-15-hotfix/pr-42524
Your branch is up to date with 'origin/version-15-hotfix'.

You are currently cherry-picking commit b94af28587.
  (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/report/cash_flow/cash_flow.js
	modified:   erpnext/accounts/report/cash_flow/cash_flow.py
	modified:   erpnext/accounts/report/financial_statements.py

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