Update gRPC version to the latest one and keep it compatible with Tendermint | gogoproto

[robert-zaremba]

Summary

In the 0.40.1 release, we encountered a problem with google.golang.org/grpc:

• Tendermint requires v1.35.0
• SDK has v1.33.2

So, the dependency resolver uses v1.35.0 for both. Unfortunately this breaks SDK.

Proposal

Update gRPC to the latest version and fix the problem

Reference:

• https://github.com/cosmos/cosmos-sdk/pull/8391/files

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[amaury1093]

For anyone debugging this, something happened between grpc v1.33.2 and v1.34.0, ref: #8162.

[clevinson]

As an intermediate step we should update documentation to add the replace line in go.mod (which was done in Gaia for Stargate release), as many chains will run into problems ohterwise.

[robert-zaremba]

@AmauryM was checking it and he says it's not possible to upgrade gRPC go proto for the compatibility with latest gogoproto.

I don't know what's failing in gRPC. But, maybe we can do a small patch there?

[amaury1093]

I'm not sure even that gRPC-go will accept that patch.

See grpc/grpc-go#4094

gogoproto is not officially supported by gRPC-Go.

If you want a codec that suits your needs better, it's easy to install your own. Just copy/paste this code into another package, update the parts that are important, and import it in your main package after any grpc imports. (If you don't control main, you can give it a new name and use the Codec Call-/Dial-/Server- Options.)

other people having the same issue: grpc/grpc-go#4192.

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TLDR: imo the correct way to solve this issue is to switch to go protobuf v2: #7488.

I'm proposing to close this issue once the docs #8658 are merged.