Implement validate_self_client method

[Farhad-Shabani]

Summary

Now by having the Protobuf and domain definitions of the rollup's ClientState we can think of how to implement the validate_self_client method.

Context

Given our latest ClientState structure for the rollup portion, sov-ibc needs internal access to the genesis_da_height, genesis_root_hash, and code_commitment so can verify the receiving client state of rollup (A) on counterparty chain (B) as part of connection messages.

Tasks

Beta Give feedback

1. genesis_root_hash: Available and stored in the genesis_hash stateValue of the sov-chain-state module.
2. genesis_da_height
3. code_commitment

Requirements

• sovereign-sdk-wip PR #490 (IBC chain state request: adding the code commitment and the genesis da height to the chain state module)