feat: in-place testnet creator (backport #7374)

[mergify]

This is an automatic backport of pull request #7374 done by Mergify.
Cherry-pick of 0b32654 has failed:

On branch mergify/bp/v22.x/pr-7374
Your branch is up to date with 'origin/v22.x'.

You are currently cherry-picking commit 0b326547.
  (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:   app/app.go
	modified:   cmd/osmosisd/cmd/root.go
	modified:   go.mod
	modified:   osmomath/go.mod
	modified:   osmoutils/go.mod
	modified:   x/epochs/go.mod
	modified:   x/ibc-hooks/go.mod

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   CHANGELOG.md
	both modified:   go.sum

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

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