feat: add HistoricalRewards gRPC query endpoint

[hallazzang]

Description

This PR adds HistoricalRewards gRPC query endpoint and fixes some bugs regarding EnableAdvanceEpoch and EnableRatioPlan flags.

While the module has been upgraded to v2, REPO variable in Makefile hasn't been updated yet so that it wasn't setting EnableAdvanceEpoch and EnableRatioPlan flags properly.
Also there was another bug that importing x/liquidity/simulation/operations.go automatically sets EnableRatioPlan to true regardless of enableRatioPlan build flag.
These bugs will be fixed through this PR.

Tasks

• Add QueryHistoricalRewards endpoint
• Update API/CLI docs
• Fix bugs with EnableAdvanceEpoch and EnableRatioPlan

[jaybxyz]

Can you fix the url in config-test.yml file as well?

[hallazzang]

Can you fix the url in config-test.yml file as well?

Did that, I'm just wondering... should we update package path in *.proto files as well? Like in this file(proto/mint/v1beta1/mint.proto):

option go_package = "github.com/cosmosquad-labs/squad/x/mint/types";

[jaybxyz]

I don't think we need to update package path in *.proto files. Doesn't it return an error if you change the path?

[hallazzang]

I don't think we need to update package path in *.proto files. Doesn't it return an error if you change the path?

Yes, actually it's working without problem right now. Not updating the path in this PR, let's discuss about it later.

[hallazzang]

@kogisin Please see #336 for further discussion.