fix: legacy node key (backport #594)

[mergify]

Description

Closes: #XXXX

Bug found when running E2E on Osmosis repo.

Summary by CodeRabbit

• Bug Fixes
  • Fixed a legacy node key issue in IAVL.

---

This is an automatic backport of pull request #594 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 8cf5abb has failed:

On branch mergify/bp/osmo-v23/v0.47.5/pr-594
Your branch is up to date with 'origin/osmo-v23/v0.47.5'.

You are currently cherry-picking commit 8cf5abb16.
  (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:   CHANGELOG.md
	both modified:   go.mod
	both modified:   go.sum
	both modified:   simapp/go.mod
	both modified:   simapp/go.sum
	both modified:   tests/go.mod
	both modified:   tests/go.sum

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

[czarcas7ic]

Only needed on IAVL v1 branches