Migrate from tendermint-proto to cometbft-proto dependency

[adizere]

Work in tandem with:

• Migrate the codebase from tendermint-rs dependency to cometbft-rs informalsystems/ibc-rs#1073
• Adapt to cometbft-rs informalsystems/hermes#3820

[mzabaluev]

As described in informalsystems/ibc-rs#1073 (comment), there is a somewhat hacky way forward that does not need waiting for upstream protos to convert to buf.build/cometbft/cometbft:

1. Fix tendermint proto imports are not consistent between cosmos-sdk and ibc-rs revisions #194 by adjusting the upstream commits.
2. Remap the tendermint.* packages to versioned module paths in cometbft_proto using the extern_path option of prost-build.