gRPC-gateway routes as alternative to legacy tendermint REST endpoints (#7965)

* WIP

* WIP setup

* WIP setup testsuite

* add node_info

* add GetLatestBlock,GetBlockByHeight grpc endpoints

* add GetValidatorSetByHeight, GetLatestValidatorSet

* fix lint

* fix tests

* proto format

* Update Makefile

* review changes

* Makefile format

* handle nil pagination

* rename query.go to service.go

* format Makefile

* format Makefile

* review changes

* review changes

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

testutil/network/util.go

@@ -66,6 +66,9 @@ func startInProcess(cfg Config, val *Validator) error {
 
 		// Add the tx service in the gRPC router.
 		app.RegisterTxService(val.ClientCtx)
+
+		// Add the tendermint queries service in the gRPC router.
+		app.RegisterTendermintService(val.ClientCtx)
 	}
 
 	if val.APIAddress != "" {