all: simplify and fix database iteration with prefix/start (#20808)

* core/state/snapshot: start fixing disk iterator seek

* ethdb, rawdb, leveldb, memorydb: implement iterators with prefix and start

* les, core/state/snapshot: iterator fixes

* all: remove two iterator methods

* all: rename Iteratee.NewIteratorWith -> NewIterator

* ethdb: fix review concerns

core/rawdb/database.go

@@ -221,7 +221,7 @@ func NewLevelDBDatabaseWithFreezer(file string, cache int, handles int, freezer
 // InspectDatabase traverses the entire database and checks the size
 // of all different categories of data.
 func InspectDatabase(db ethdb.Database) error {
-	it := db.NewIterator()
+	it := db.NewIterator(nil, nil)
 	defer it.Release()
 
 	var (