refactor: Loosen account currency validation on groups (backport #42774)

[mergify]

Loosen the accounts validation to allow foreign currency default accounts for receivable / payable accounts and advances in Customer / Supplier Group.

Both the accounts should be of the same currency. That validation stays.

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This is an automatic backport of pull request #42774 done by Mergify.

[mergify]

Cherry-pick of 066e935 has failed:

On branch mergify/bp/version-14-hotfix/pr-42774
Your branch is up to date with 'origin/version-14-hotfix'.

You are currently cherry-picking commit 066e935892.
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Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   erpnext/setup/doctype/customer_group/customer_group.py

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Cherry-pick of 164498b has failed:

On branch mergify/bp/version-14-hotfix/pr-42774
Your branch is ahead of 'origin/version-14-hotfix' by 1 commit.
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You are currently cherry-picking commit 164498bafb.
  (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/setup/doctype/supplier_group/supplier_group.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