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/channel.go

@@ -21,7 +21,6 @@ import (
 	"github.com/btcsuite/btcd/txscript"
 	"github.com/btcsuite/btcd/wire"
 	"github.com/btcsuite/btclog/v2"
-	"github.com/davecgh/go-spew/spew"
 	"github.com/lightningnetwork/lnd/chainntnfs"
 	"github.com/lightningnetwork/lnd/channeldb"
 	"github.com/lightningnetwork/lnd/fn/v2"
@@ -2850,7 +2849,7 @@ func (lc *LightningChannel) fetchCommitmentView(
 		return nil, fmt.Errorf("height=%v, for ChannelPoint(%v) "+
 			"attempts to create commitment with feerate %v: %v",
 			nextHeight, lc.channelState.FundingOutpoint,
-			effFeeRate, spew.Sdump(commitTx))
+			effFeeRate, lnutils.SpewLogClosure(commitTx))
 	}
 
 	// Given the custom blob of the past state, and this new HTLC view,