Instantiate tests DBIteratorTestForPinnedData (#8051)

Summary:
a trial gtest upgrade discovered some parameterized tests missing instantiation. By some miracle, they still pass.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/8051

Test Plan: thisisthetest

Reviewed By: mrambacher

Differential Revision: D27003684

Pulled By: pdillinger

fbshipit-source-id: cde1cab1551fb282f67d462d46574bd30bd5e61f

db/db_iterator_test.cc

@@ -1553,6 +1553,10 @@ TEST_P(DBIteratorTestForPinnedData, PinnedDataIteratorRandomizedFlush) {
   PinnedDataIteratorRandomized(TestConfig::FLUSH_EVERY_1000);
 }
 
+INSTANTIATE_TEST_CASE_P(DBIteratorTestForPinnedDataInstance,
+                        DBIteratorTestForPinnedData,
+                        testing::Values(true, false));
+
 #ifndef ROCKSDB_LITE
 TEST_P(DBIteratorTest, PinnedDataIteratorMultipleFiles) {
   Options options = CurrentOptions();