Improve devnet ICA test coverage and refresh devnet deps

[akobrin1]

• Add TestICARequestActionAppPubkeyRequired and refactor the ICA hermes suite (renamed files, clearer flow/comments, use sdk-go/pkg/crypto helpers)
• Update devnet module deps to lumera v1.9.1, sdk-go v1.0.5, supernode v2.4.19, and document local replace toggles
• Promote golang/mock to a direct dependency and fix gomock import in unbonding_test.go

[roomote]

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Review complete. No issues found.

The changes look good:

• New TestICARequestActionAppPubkeyRequired test properly validates app_pubkey requirements for ICA requests
• Refactoring to use sdk-go/pkg/crypto helpers removes code duplication
• File renames improve clarity (ibc_hermes_* -> ibc_*)
• Dependency updates to lumera v1.9.1, sdk-go v1.0.5, and supernode v2.4.19 are straightforward version bumps
• Promoting golang/mock to direct dependency and fixing the import in unbonding_test.go is correct

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