Replace cosmos-sdk/x/upgrade with cosmossdk.io/x/upgrade

In Cosmos `0.50.x`, the aforementioned `upgrade` package became a standalone
module placed under `cosmossdk.io` namespace. Here we adjust our codebase
to this change.

See: cosmos/cosmos-sdk#14764 and
https://docs.cosmos.network/main/build/migrations/upgrading#extract-upgrade-to-a-standalone-module

Author: lukasz-zimnoch

app/ante/evm/utils_test.go

@@ -27,7 +27,7 @@ import (
 	utiltx "github.com/evmos/evmos/v12/testutil/tx"
 	evmtypes "github.com/evmos/evmos/v12/x/evm/types"
 
-	upgradetypes "github.com/cosmos/cosmos-sdk/x/upgrade/types"
+	upgradetypes "cosmossdk.io/x/upgrade/types"
 )
 
 func (suite *AnteTestSuite) BuildTestEthTx(

app/app.go

@@ -51,6 +51,9 @@ import (
 	simappparams "cosmossdk.io/simapp/params"
 	"cosmossdk.io/store/streaming"
 	storetypes "cosmossdk.io/store/types"
+	"cosmossdk.io/x/upgrade"
+	upgradekeeper "cosmossdk.io/x/upgrade/keeper"
+	upgradetypes "cosmossdk.io/x/upgrade/types"
 	servertypes "github.com/cosmos/cosmos-sdk/server/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/types/module"
@@ -76,9 +79,6 @@ import (
 	"github.com/cosmos/cosmos-sdk/x/params"
 	paramskeeper "github.com/cosmos/cosmos-sdk/x/params/keeper"
 	paramstypes "github.com/cosmos/cosmos-sdk/x/params/types"
-	"github.com/cosmos/cosmos-sdk/x/upgrade"
-	upgradekeeper "github.com/cosmos/cosmos-sdk/x/upgrade/keeper"
-	upgradetypes "github.com/cosmos/cosmos-sdk/x/upgrade/types"
 
 	ethante "github.com/evmos/evmos/v12/app/ante/evm"
 	"github.com/evmos/evmos/v12/encoding"