update ledger tool to restore cost table from blockstore (backport #18489)

[mergify]

This is an automatic backport of pull request #18489 done by Mergify.
Cherry-pick of b6dff12 has failed:

On branch mergify/bp/v1.7/pr-18489
Your branch is up to date with 'origin/v1.7'.

You are currently cherry-picking commit b6dff1292.
  (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/rm <file>..." as appropriate to mark resolution)
	deleted by us:   core/src/cost_model.rs
	both modified:   core/src/validator.rs
	both modified:   ledger-tool/src/main.rs

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/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[mergify]

automerge label removed due to a CI failure

[tao-stones]

pull from 1.7, aiming 1.8