Disable kPipelinedWrite in MultiThreaded (#5442)

Summary:
TSAN tests report a race condition. We temporarily exclude kPipelinedWrite from MultiThreaded until the race condition is fixed.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5442

Differential Revision: D15782349

Pulled By: maysamyabandeh

fbshipit-source-id: 42b4f9b3fa9137f0675e13ad132c0a06800c1bdd

db/db_test.cc

@@ -2285,6 +2285,7 @@ class MultiThreadedDBTest
 };
 
 TEST_P(MultiThreadedDBTest, MultiThreaded) {
+  if (option_config_ == kPipelinedWrite) return;
   anon::OptionsOverride options_override;
   options_override.skip_policy = kSkipNoSnapshot;
   Options options = CurrentOptions(options_override);