Summary:
When the DB is opened, RocksDB creates a temp OPTIONS file, writes the current options to it, and renames it. In case of a failure, the temp file is left behind, and is not deleted by PurgeObsoleteFiles(). Fix this by explicitly deleting the temp file if writing to it or renaming it fails.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/11423

Test Plan: Add a unit test

Reviewed By: akankshamahajan15

Differential Revision: D45540454

Pulled By: anand1976

fbshipit-source-id: 47facdc30d8cc5667036312d04b21d3fc253c92e