Use custom KV store config to handle progressively increasing gas usage (#30)

Part of [Create an external fixturenet-laconicd stack](https://www.notion.so/Create-an-external-fixturenet-laconicd-stack-3b33cc2317444f4da209c4472f4244ed)

Reviewed-on: cerc-io/laconic2d#30
Co-authored-by: Prathamesh Musale <prathamesh.musale0@gmail.com>
Co-committed-by: Prathamesh Musale <prathamesh.musale0@gmail.com>

utils/context.go

@@ -0,0 +1,29 @@
+package utils
+
+import (
+	"fmt"
+
+	"cosmossdk.io/log"
+	storetypes "cosmossdk.io/store/types"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+)
+
+func CtxWithCustomKVGasConfig(ctx *sdk.Context) *sdk.Context {
+	updatedCtx := ctx.WithKVGasConfig(storetypes.GasConfig{
+		HasCost:          0,
+		DeleteCost:       0,
+		ReadCostFlat:     0,
+		ReadCostPerByte:  0,
+		WriteCostFlat:    0,
+		WriteCostPerByte: 0,
+		IterNextCostFlat: 0,
+	})
+
+	return &updatedCtx
+}
+
+func LogTxGasConsumed(ctx sdk.Context, logger log.Logger, tx string) {
+	gasConsumed := ctx.GasMeter().GasConsumed()
+	logger.Info("tx executed", "method", tx, "gas_consumed", fmt.Sprintf("%d", gasConsumed))
+}