chore: Deprecate QueryUpgradedConsensusState (cosmos#9906) (cosmos#9909)

## Description

Closes: cosmos#9855

Deprecate `QueryUpgradedConsensusState` from x/upgrade

---

### Author Checklist

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- [ ] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
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- [ ] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
- [ ] reviewed "Files changed" and left comments if necessary
- [ ] confirmed all CI checks have passed

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I have...

- [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] confirmed `!` in the type prefix if API or client breaking change
- [ ] confirmed all author checklist items have been addressed
- [ ] reviewed state machine logic
- [ ] reviewed API design and naming
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- [ ] manually tested (if applicable)

(cherry picked from commit 0bcce5d)

Co-authored-by: likhita-809 <[email protected]>

CHANGELOG.md

@@ -42,6 +42,10 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 * [\#9860](https://github.com/cosmos/cosmos-sdk/pull/9860) Emit transaction fee in ante handler fee decorator. The event type is `tx` and the attribute is `fee`.
 
+ ### Deprecated
+
+* (x/upgrade) [\#9906](https://github.com/cosmos/cosmos-sdk/pull/9906) Deprecate `UpgradeConsensusState` gRPC query since this functionality is only used for IBC, which now has its own [IBC replacement](https://github.com/cosmos/ibc-go/blob/2c880a22e9f9cc75f62b527ca94aa75ce1106001/proto/ibc/core/client/v1/query.proto#L54)
+
 ## [v0.43.0](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.43.0) - 2021-08-10
 
 ### Features

x/upgrade/keeper/grpc_query.go

@@ -32,12 +32,9 @@ func (k Keeper) AppliedPlan(ctx context.Context, req *types.QueryAppliedPlanRequ
 }
 
 // UpgradedConsensusState implements the Query/UpgradedConsensusState gRPC method
-func (k Keeper) UpgradedConsensusState(ctx context.Context, req *types.QueryUpgradedConsensusStateRequest) (*types.QueryUpgradedConsensusStateResponse, error) { //nolint:staticcheck // we're using a deprecated call for compatibility
-	consState, err := k.GetUpgradedConsensusState(ctx, req.LastHeight)
-	if err != nil {
-		if errors.Is(err, types.ErrNoUpgradedConsensusStateFound) {
-			return &types.QueryUpgradedConsensusStateResponse{}, nil //nolint:staticcheck // we're using a deprecated call for compatibility
-		}
+// nolint: staticcheck
+func (k Keeper) UpgradedConsensusState(c context.Context, req *types.QueryUpgradedConsensusStateRequest) (*types.QueryUpgradedConsensusStateResponse, error) {
+	ctx := sdk.UnwrapSDKContext(c)
 
 		return nil, err
 	}