Ensure adequate support and tests for Sovereign SDK integration

[Farhad-Shabani]

Background

In continuation of #861, this issue serves to track our advancements in achieving the goal of "Ensuring adequate support and tests for Sovereign SDK integration" during Q4 2023. This activity primarily entails the resolution of remaining implementation details related to ibc-rs, along with conducting essential tests to assess the functionality of IBC core and token transfer application.
Furthermore, we will also be working on investigating and implementing an on-chain Sovereign light client to be deployed on Cosmos chains and facilitate bidirectional communication for this IBC integration.

Tasks

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1. Support first iteration of integrating ibc-rs into Sovereign SDK chains #861
   13 of 13
   A: tracking O: usability +2
2. Keep track of Sovereign light client implementation informalsystems/sovereign-ibc#2
   13 of 16
   sov-light-client tracking +2
3. Enable demo-rollup to work with the integrated ibc module informalsystems/sovereign-ibc#4
   sov-sdk testing +2
   
4. Implement tests for token transfer from Sovereign chains informalsystems/sovereign-ibc#5
   modules testing +2
   
5. TransferContext::get_escrow_account(): cache escrow account addresses informalsystems/sovereign-ibc#6
   modules +1
   
6. Implement ValidationContext::host_consensus_state() for IbcExecutionContext informalsystems/sovereign-ibc#7
   modules +1
   

[Farhad-Shabani]

The objective of this issue accomplishment and all the necessary features have been incorporated into ibc-rs through various issues/PRs since Q3 2023.