Update protobufs for IBC-Go to v4.0.0-rc0 and Cosmos SDK to v0.45.6

[romac]

Summary

Update protobufs for IBC-Go to v4.0.0-rc0 and Cosmos SDK to v0.45.6

Problem Definition

The is needed to pull in the new Protobuf definitions for ICS 029.

Proposal

Done in https://github.com/informalsystems/ibc-rs/pull/2388

Acceptance Criteria

https://github.com/informalsystems/ibc-rs/pull/2388 is merged

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