refactor: remove viper as a direct dependency (backport #21635) (#21672)

Co-authored-by: Matt Kocubinski <mkocubinski@gmail.com>
Co-authored-by: Julien Robert <julien@rbrt.fr>

testutil/network/util.go

@@ -23,6 +23,7 @@ import (
 	banktypes "cosmossdk.io/x/bank/types"
 
 	"github.com/cosmos/cosmos-sdk/client"
+	"github.com/cosmos/cosmos-sdk/client/flags"
 	"github.com/cosmos/cosmos-sdk/server"
 	"github.com/cosmos/cosmos-sdk/server/api"
 	servergrpc "github.com/cosmos/cosmos-sdk/server/grpc"
@@ -30,7 +31,6 @@ import (
 	"github.com/cosmos/cosmos-sdk/testutil"
 	authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
 	"github.com/cosmos/cosmos-sdk/x/genutil"
-	genutiltest "github.com/cosmos/cosmos-sdk/x/genutil/client/testutil"
 	genutiltypes "github.com/cosmos/cosmos-sdk/x/genutil/types"
 )
 
@@ -180,7 +180,11 @@ func collectGenFiles(cfg Config, vals []*Validator, cmtConfigs []*cmtcfg.Config,
 		}
 
 		v := vals[i].GetViper()
-		err = genutiltest.TrackCometConfig(v, nodeDir)
+		v.Set(flags.FlagHome, nodeDir)
+		v.SetConfigType("toml")
+		v.SetConfigName("config")
+		v.AddConfigPath(filepath.Join(nodeDir, "config"))
+		err = v.ReadInConfig()
 		if err != nil {
 			return err
 		}