Rename Order to Ordering for MsgRegisterInterchainAccount. (backport #5674)

[mergify]

This is an automatic backport of pull request #5674 done by Mergify.
Cherry-pick of 61e3eb5 has failed:

On branch mergify/bp/release/v8.1.x/pr-5674
Your branch is up to date with 'origin/release/v8.1.x'.

You are currently cherry-picking commit 61e3eb59.
  (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:   modules/apps/27-interchain-accounts/controller/client/cli/tx.go
	modified:   modules/apps/27-interchain-accounts/controller/keeper/account.go
	modified:   modules/apps/27-interchain-accounts/controller/keeper/msg_server.go
	modified:   modules/apps/27-interchain-accounts/controller/types/tx.pb.go
	modified:   proto/ibc/applications/interchain_accounts/controller/v1/tx.proto

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   docs/docs/02-apps/02-interchain-accounts/05-messages.md
	both modified:   modules/apps/27-interchain-accounts/controller/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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