trie, les, tests, core: implement trie tracer (#24403)

Trie tracer is an auxiliary tool to capture all deleted nodes
which can't be captured by trie.Committer. The deleted nodes
can be removed from the disk later.

trie/committer.go

@@ -89,7 +89,7 @@ func (c *committer) commit(n node, db *Database) (node, int, error) {
 	if hash != nil && !dirty {
 		return hash, 0, nil
 	}
-	// Commit children, then parent, and remove remove the dirty flag.
+	// Commit children, then parent, and remove the dirty flag.
 	switch cn := n.(type) {
 	case *shortNode:
 		// Commit child