Summary

Heights are not included in gRPC requests as the height can be set in the SDK context. This isn't very useful for non-go implementations which might have a difficult time setting the SDK context correctly.

We should add a height request into the gRPC requests. ibc-rs is currently having difficulty doing gRPC requests at specific heights.

The height in the request seems sufficiently generalized that other implementations could implement the same gRPC routes with the same proto files

cc @fedekunze

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