les, light: remove untrusted header retrieval in ODR (#21907)

* les, light: remove untrusted header retrieval in ODR

* les: polish

* light: check the hash equality in odr

light/trie.go

@@ -30,6 +30,10 @@ import (
 	"github.com/ethereum/go-ethereum/trie"
 )
 
+var (
+	sha3Nil = crypto.Keccak256Hash(nil)
+)
+
 func NewState(ctx context.Context, head *types.Header, odr OdrBackend) *state.StateDB {
 	state, _ := state.New(head.Root, NewStateDatabase(ctx, head, odr), nil)
 	return state