chore(deps): Update grpc-gateway to v2

[alexanderbez]

Description

Closes: #8055

Update grpc-gateway to v2, which apparently fixes issues with encoding in query args.

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[alexanderbez]

This will require us to update github.com/cosmos/gogogateway...I'll get back to this later. Would appreciate some help on it if anyone has cycles.

[alexanderbez]

@tac0turtle so correct me if I'm wrong here, but we're blocked here and we can't proceed because of downstream gogoproto right?

[tac0turtle]

gateway v2 requires protoreflect to be present on the types. Since we dont use protov2 in modules then when we copy these into the module they dont have the correct types. There seems to be a standalone mode (https://grpc-ecosystem.github.io/grpc-gateway/docs/mapping/grpc_api_configuration/#using-an-external-configuration-file), we could look into adopting something like this. Not 100% sure what it involves

[tac0turtle]

closing this for now, we should look into grpcgateway v2 standalone mode.