chore: add redundancy checks for V2 Msgs

[bznein]

Description

Notes: will merge after #7464 to make sure the timeout case is not broken here.

I didn't add tests for ALL new code paths. I followed the current structure of tests and basically added V2 cases for equivalent tests. Happy to add more cases if people prefer

closes: #7491

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

• Targeted PR against the correct branch (see CONTRIBUTING.md).
• Linked to GitHub issue with discussion and accepted design, OR link to spec that describes this work.
• Code follows the module structure standards and Go style guide.
• Wrote unit and integration tests.
• Updated relevant documentation (docs/).
• Added relevant godoc comments.
• Provide a conventional commit message to follow the repository standards.
• Include a descriptive changelog entry when appropriate. This may be left to the discretion of the PR reviewers. (e.g. chores should be omitted from changelog)
• Re-reviewed Files changed in the GitHub PR explorer.
• Review SonarCloud Report in the comment section below once CI passes.

[sonarcloud]

Quality Gate failed for 'ibc-go'

Failed conditions
67.0% Coverage on New Code (required ≥ 80%)

See analysis details on SonarCloud

[chatton]

LGTM!