Disable fault injection with BatchedOpsStressTest and MultiOpsTxnsStressTest (#12794)

Disable fault injection with BatchedOpsStressTest and MultiOpsTxnsStressTest (#12794)

Summary:
**Context/Summary:**

https://github.com/facebook/rocksdb/pull/12713 accidentally turned on fault injection in BatchedOpsStressTest and MultiOpsTxnsStressTest. Though this was meant to be an increased testing coverage, it also made our CI noisy. For now we decided to disable it before we manage to stabilize the CI and fix bugs surfaced in NonBatchedOpsStressTest which impacts more users.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/12794

Test Plan: CI

Reviewed By: cbi42

Differential Revision: D58897598

Pulled By: hx235

fbshipit-source-id: 8094072ef1bff27d7825efed0876f365a31fef9c