core: fix failing tests (#22888)

This PR fixes two errors that regressed when EIP-1559 was merged.

core/blockchain_test.go

@@ -1357,8 +1357,8 @@ func TestEIP155Transition(t *testing.T) {
 		}
 	})
 	_, err := blockchain.InsertChain(blocks)
-	if err != types.ErrInvalidChainId {
-		t.Error("expected error:", types.ErrInvalidChainId)
+	if have, want := err, types.ErrInvalidChainId; !errors.Is(have, want) {
+		t.Errorf("have %v, want %v", have, want)
 	}
 }