feat: remove consumer panic when ccv channel is closed (backport #1127)

[mergify]

This is an automatic backport of pull request #1127 done by Mergify.
Cherry-pick of 1412923 has failed:

On branch mergify/bp/release/v3.0.x/pr-1127
Your branch is up to date with 'origin/release/v3.0.x'.

You are currently cherry-picking commit 1412923.
  (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:   CHANGELOG.md
	modified:   testutil/integration/debug_test.go
	modified:   x/ccv/consumer/module.go

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   tests/integration/stop_consumer.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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