chore: Add consensus state heights query (backport cosmos#1336) (cosm…

…os#1507)

* chore: Add consensus state heights query (cosmos#1336)

* add ConsensusStateHeights query

* add cli for ConsensusStateHeights Query

* update CHANGELOG.md

* Update modules/core/02-client/keeper/grpc_query.go

Co-authored-by: Damian Nolan <[email protected]>

* Update modules/core/02-client/client/cli/query.go

Co-authored-by: Damian Nolan <[email protected]>

* Update modules/core/02-client/client/cli/query.go

Co-authored-by: Damian Nolan <[email protected]>

* Update modules/core/02-client/client/cli/query.go

Co-authored-by: Damian Nolan <[email protected]>

* update consensus height query

* very minor changes in modules/core/02-client grpc_query_test

* Update modules/core/02-client/keeper/grpc_query_test.go

Co-authored-by: Sean King <[email protected]>

* Update modules/core/02-client/keeper/grpc_query_test.go

Co-authored-by: Sean King <[email protected]>

* Update modules/core/02-client/keeper/grpc_query_test.go

Co-authored-by: Sean King <[email protected]>

* Update modules/core/02-client/keeper/grpc_query_test.go

Co-authored-by: Sean King <[email protected]>

* Update modules/core/02-client/client/cli/query.go

Co-authored-by: Sean King <[email protected]>

* Update modules/core/02-client/keeper/grpc_query_test.go

Co-authored-by: Carlos Rodriguez <[email protected]>

* Update CHANGELOG.md

Co-authored-by: colin axnér <[email protected]>

* update swagger.yaml; update 02-client grpc_query_test

* Update modules/core/02-client/keeper/grpc_query_test.go

Co-authored-by: Damian Nolan <[email protected]>

* nit

Co-authored-by: Damian Nolan <[email protected]>
Co-authored-by: Sean King <[email protected]>
Co-authored-by: Carlos Rodriguez <[email protected]>
Co-authored-by: vuong <[email protected]>
Co-authored-by: colin axnér <[email protected]>
(cherry picked from commit 042d818)

# Conflicts:
#	CHANGELOG.md
#	docs/client/swagger-ui/swagger.yaml

* fix conflicts and change gRPC web route to consensus_state/{client_id}/heights

Co-authored-by: khanh <[email protected]>
Co-authored-by: crodriguezvega <[email protected]>

CHANGELOG.md

@@ -55,7 +55,8 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Features
 
-* (modules/apps/transfer) [\#1416](https://github.com/cosmos/ibc-go/pull/1416) Adding gRPC endpoint for getting an escrow account for a given port-id and channel-id.
+* (modules/core/02-client) [\#1336](https://github.com/cosmos/ibc-go/pull/1336) Adding Query/ConsensusStateHeights gRPC for fetching the height of every consensus state associated with a client.
+* (modules/apps/transfer) [\#1416](https://github.com/cosmos/ibc-go/pull/1416) Adding gRPC endpoint for getting an escrow account for a given port-id and channel-id. 
 
 ### Bug Fixes