WiredTiger is causing possibly* false positives in the unit tests. We've already blacklisted WiredTiger in TSAN, but that only affects calls that originate in those sources. To fully remove WiredTiger failures from unit tests, we need to add WiredTiger to the suppressions as well. Once we have fixed all the remaining test failures with TSAN, we can go back and revisit removing these suppressions so we can see whether we can do anything else to address them.