fix(statemachine)!: re-implement legacy msg interface (backport #3907)

[mergify]

This is an automatic backport of pull request #3907 done by Mergify.
Cherry-pick of f2b2249 has failed:

On branch mergify/bp/release/v7.2.x/pr-3907
Your branch is up to date with 'origin/release/v7.2.x'.

You are currently cherry-picking commit f2b22491.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
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Changes to be committed:
	modified:   CHANGELOG.md

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   modules/apps/29-fee/types/msgs.go
	both modified:   modules/apps/transfer/types/msgs.go

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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[damiannolan]

Remove MsgUpdateParams stuff as its not being introduced until v8.

[crodriguezvega]

Thank you for taking care of the conflicts, @damiannolan 💟