Multi payload e2e test

[AdityaSripal]

Description

closes: #8553

---

Before we can merge this PR, please make sure that all the following items have been
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• Linked to GitHub issue with discussion and accepted design, OR link to spec that describes this work.
• Include changelog entry when appropriate (e.g. chores should be omitted from changelog).
• Wrote unit and integration tests if relevant.
• Updated documentation (docs/) if anything is changed.
• Added godoc comments if relevant.
• Self-reviewed Files changed in the GitHub PR explorer.
• Provide a conventional commit message to follow the repository standards.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 57.61%. Comparing base (e771540) to head (3bbe27d).

Additional details and impacted files

@@                    Coverage Diff                    @@
##           gjermund/ibc-v2-relaying    #8563   +/-   ##
=========================================================
  Coverage                     57.61%   57.61%           
=========================================================
  Files                           317      317           
  Lines                         22675    22675           
=========================================================
  Hits                          13065    13065           
  Misses                         9005     9005           
  Partials                        605      605           

Flag	Coverage Δ
08-wasm	65.99% <ø> (ø)
e2e	1.13% <ø> (ø)
ibc-go	63.06% <ø> (ø)

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[gjermundgaraba]

I'll wait to merge this, but this looks good to me!