lnwallet: replace spew.Sdump with lnutils.SpewLogClosure for lazy evaluation

In this commit, we replace all instances of spew.Sdump in the lnwallet
package and its subpackages with lnutils.SpewLogClosure. This change
ensures that expensive debug dump operations are only performed when the
log level actually requires them.

lnwallet/btcwallet/btcwallet.go

@@ -24,12 +24,12 @@ import (
 	"github.com/btcsuite/btcwallet/wallet/txrules"
 	"github.com/btcsuite/btcwallet/walletdb"
 	"github.com/btcsuite/btcwallet/wtxmgr"
-	"github.com/davecgh/go-spew/spew"
 	"github.com/lightningnetwork/lnd/blockcache"
 	"github.com/lightningnetwork/lnd/fn/v2"
 	"github.com/lightningnetwork/lnd/input"
 	"github.com/lightningnetwork/lnd/keychain"
 	"github.com/lightningnetwork/lnd/kvdb"
+	"github.com/lightningnetwork/lnd/lnutils"
 	"github.com/lightningnetwork/lnd/lnwallet"
 	"github.com/lightningnetwork/lnd/lnwallet/chainfee"
 )
@@ -1184,7 +1184,8 @@ func (b *BtcWallet) PublishTransaction(tx *wire.MsgTx, label string) error {
 	}
 
 	result := results[0]
-	log.Debugf("TestMempoolAccept result: %s", spew.Sdump(result))
+	log.Debugf("TestMempoolAccept result: %s",
+		lnutils.SpewLogClosure(result))
 
 	// Once mempool check passed, we can publish the transaction.
 	if result.Allowed {
@@ -1833,7 +1834,8 @@ func (b *BtcWallet) CheckMempoolAcceptance(tx *wire.MsgTx) error {
 	}
 
 	result := results[0]
-	log.Debugf("TestMempoolAccept result: %s", spew.Sdump(result))
+	log.Debugf("TestMempoolAccept result: %s",
+		lnutils.SpewLogClosure(result))
 
 	// Mempool check failed, we now map the reject reason to a proper RPC
 	// error and return it.