wormchain: integration tests for wormchain-ibc-receiver

[kakucodes]

Add Integration Tests for IBC Contracts

Overview

This PR implements comprehensive integration tests for wormchain-ibc-receiver and wormhole-ibc contracts using Interchain test framework, providing a realistic testing environment for IBC functionality.

Key Changes

• Added integration tests using Interchain test framework to validate contract behavior

Technical Details

• Tests run in a simulated multi-chain environment to verify IBC functionality
• Contract interfaces are auto-generated from Rust contracts to Go
• Automated channel creation and management through go-relayer
• Full end-to-end testing of IBC packet transmission and handling

Testing

Tests cover:

• Channel establishment between chains
• Packet transmission and acknowledgment
• Error handling and recovery scenarios
• Contract state verification

Dependencies

• Interchain test framework
• go-codegen for interface generation
• cosmos/relayer for IBC operations

Impact

These tests significantly improve our confidence in the IBC contracts by:

• Validating behavior in a realistic environment
• Ensuring proper integration between components
• Automating previously manual testing processes

[joelsmith-2019]

Marc and I spent time today walking through all of the code changes & tests. Everything looked good to me.