Problem: ibc middleware verify sender address incorrectly

[yihuang]

Description

Solution:

• remove unnecessary validation on sender address

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Author Checklist

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please add links to any relevant follow up issues.

I have...

• tackled an existing issue or discussed with a team member
• left instructions on how to review the changes
• targeted the main branch

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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