Use zap logger in txs package (#5973)

## Motivation

In the continued effort to replace our custom `log.Log` with `zap.Logger` I updated the `txs` package to not depend on our logger any more.

api/grpcserver/grpcserver_test.go

@@ -2275,7 +2275,7 @@ func TestEventsReceived(t *testing.T) {
 	time.Sleep(time.Millisecond * 50)
 
 	svm := vm.New(sql.InMemory(), vm.WithLogger(logtest.New(t)))
-	conState := txs.NewConservativeState(svm, sql.InMemory(), txs.WithLogger(logtest.New(t).WithName("conState")))
+	conState := txs.NewConservativeState(svm, sql.InMemory(), txs.WithLogger(zaptest.NewLogger(t).Named("conState")))
 	conState.AddToCache(context.Background(), globalTx, time.Now())
 
 	weight := new(big.Rat).SetFloat64(18.7)

blocks/utils.go

@@ -156,11 +156,11 @@ func getBlockTXs(
 	stateF := func(_ types.Address) (uint64, uint64) {
 		return 0, math.MaxUint64
 	}
-	txCache := txs.NewCache(stateF, logger)
+	txCache := txs.NewCache(stateF, logger.Zap())
 	if err := txCache.BuildFromTXs(mtxs, blockSeed); err != nil {
 		return nil, fmt.Errorf("build txs for block: %w", err)
 	}
-	byAddrAndNonce := txCache.GetMempool(logger)
+	byAddrAndNonce := txCache.GetMempool(logger.Zap())
 	if len(byAddrAndNonce) == 0 {
 		logger.With().Warning("no feasible txs for block")
 		return nil, nil
@@ -179,7 +179,7 @@ func getBlockTXs(
 	mt := mt19937.New()
 	mt.SeedFromSlice(toUint64Slice(blockSeed))
 	rng := rand.New(mt)
-	ordered := txs.ShuffleWithNonceOrder(logger, rng, len(candidates), candidates, byAddrAndNonce)
+	ordered := txs.ShuffleWithNonceOrder(logger.Zap(), rng, len(candidates), candidates, byAddrAndNonce)
 	if gasLimit > 0 {
 		ordered = prune(logger, ordered, byTid, gasLimit)
 	}

node/node.go

@@ -648,7 +648,7 @@ func (app *App) initServices(ctx context.Context) error {
 			BlockGasLimit:     app.Config.BlockGasLimit,
 			NumTXsPerProposal: app.Config.TxsPerProposal,
 		}),
-		txs.WithLogger(app.addLogger(ConStateLogger, lg)))
+		txs.WithLogger(app.addLogger(ConStateLogger, lg).Zap()))
 
 	genesisAccts := app.Config.Genesis.ToAccounts()
 	if len(genesisAccts) > 0 {
@@ -785,7 +785,7 @@ func (app *App) initServices(ctx context.Context) error {
 	app.txHandler = txs.NewTxHandler(
 		app.conState,
 		app.host.ID(),
-		app.addLogger(TxHandlerLogger, lg),
+		app.addLogger(TxHandlerLogger, lg).Zap(),
 	)
 
 	app.hOracle = eligibility.New(