Fix failure to clean the temporary directory due to NotFound in crash test checkpoint creation (#12919)

Summary:
**Context/Summary:**
b26b395e0a propagates `CleanStagingDirectory()` status to `CreateCheckpoint()`.  However, we didn't return early when `Status s = db_->GetEnv()->FileExists(full_private_path);` return non-NotFound non-ok stratus in `CleanStagingDirectory()`. Therefore we can proceed to the next step when `full_private_path` doesn't exist.
```
Verification failed: Checkpoint failed: Operation aborted: Failed to clean the temporary directory /dev/shm/rocksdb.J4Su/rocksdb_crashtest_blackbox/.checkpoint28.tmp needed before checkpoint creation : NotFound:

db_stress: db_stress_tool/db_stress_test_base.cc:549: void rocksdb::StressTest::ProcessStatus(rocksdb::SharedState*, std::string, const rocksdb::Status&, bool) const: Assertion `false' failed.
```

Pull Request resolved: https://github.com/facebook/rocksdb/pull/12919

Test Plan:
Below failed before the fix and passes after

```
./db_stress --WAL_size_limit_MB=1 --WAL_ttl_seconds=0 --acquire_snapshot_one_in=100 --adaptive_readahead=1 --adm_policy=1 --advise_random_on_open=0 --allow_data_in_errors=True --allow_fallocate=1 --async_io=1 --auto_readahead_size=0 --avoid_flush_during_recovery=1 --avoid_flush_during_shutdown=0 --avoid_unnecessary_blocking_io=1 --backup_max_size=104857600 --backup_one_in=100000 --batch_protection_bytes_per_key=8 --bgerror_resume_retry_interval=1000000 --block_align=0 --block_protection_bytes_per_key=4 --block_size=16384 --bloom_before_level=2 --bloom_bits=4 --bottommost_compression_type=snappy --bottommost_file_compaction_delay=0 --bytes_per_sync=0 --cache_index_and_filter_blocks=1 --cache_index_and_filter_blocks_with_high_priority=0 --cache_size=8388608 --cache_type=auto_hyper_clock_cache --charge_compression_dictionary_building_buffer=0 --charge_file_metadata=1 --charge_filter_construction=1 --charge_table_reader=1 --check_multiget_consistency=0 --check_multiget_entity_consistency=0 --checkpoint_one_in=10000 --checksum_type=kxxHash64 --clear_column_family_one_in=0 --compact_files_one_in=1000 --compact_range_one_in=1000000 --compaction_pri=3 --compaction_readahead_size=1048576 --compaction_ttl=0 --compress_format_version=2 --compressed_secondary_cache_ratio=0.0 --compressed_secondary_cache_size=0 --compression_checksum=0 --compression_max_dict_buffer_bytes=0 --compression_max_dict_bytes=0 --compression_parallel_threads=1 --compression_type=none --compression_use_zstd_dict_trainer=0 --compression_zstd_max_train_bytes=0 --continuous_verification_interval=0 --daily_offpeak_time_utc= --data_block_index_type=0 --db=/dev/shm/rocksdb.J4Su/rocksdb_crashtest_blackbox --db_write_buffer_size=134217728 --default_temperature=kUnknown --default_write_temperature=kHot --delete_obsolete_files_period_micros=21600000000 --delpercent=4 --delrangepercent=1 --destroy_db_initially=0 --detect_filter_construct_corruption=0 --disable_file_deletions_one_in=1000000 --disable_manual_compaction_one_in=10000 --disable_wal=0 --dump_malloc_stats=0 --enable_checksum_handoff=0 --enable_compaction_filter=0 --enable_custom_split_merge=0 --enable_do_not_compress_roles=1 --enable_index_compression=1 --enable_memtable_insert_with_hint_prefix_extractor=0 --enable_pipelined_write=0 --enable_sst_partitioner_factory=0 --enable_thread_tracking=0 --enable_write_thread_adaptive_yield=1 --error_recovery_with_no_fault_injection=1 --exclude_wal_from_write_fault_injection=0 --expected_values_dir=/dev/shm/rocksdb.J4Su/rocksdb_crashtest_expected --fail_if_options_file_error=1 --fifo_allow_compaction=1 --file_checksum_impl=xxh64 --fill_cache=1 --flush_one_in=1000000 --format_version=6 --get_all_column_family_metadata_one_in=1000000 --get_current_wal_file_one_in=0 --get_live_files_apis_one_in=1000000 --get_properties_of_all_tables_one_in=1000000 --get_property_one_in=1000000 --get_sorted_wal_files_one_in=0 --hard_pending_compaction_bytes_limit=274877906944 --high_pri_pool_ratio=0.5 --index_block_restart_interval=13 --index_shortening=0 --index_type=3 --ingest_external_file_one_in=0 --initial_auto_readahead_size=16384 --inplace_update_support=0 --iterpercent=10 --key_len_percent_dist=1,30,69 --key_may_exist_one_in=100000 --last_level_temperature=kWarm --level_compaction_dynamic_level_bytes=1 --lock_wal_one_in=1000000 --log_file_time_to_roll=0 --log_readahead_size=0 --long_running_snapshots=0 --low_pri_pool_ratio=0 --lowest_used_cache_tier=0 --manifest_preallocation_size=5120 --manual_wal_flush_one_in=1000 --mark_for_compaction_one_file_in=10 --max_auto_readahead_size=16384 --max_background_compactions=20 --max_bytes_for_level_base=10485760 --max_key=2500000 --max_key_len=3 --max_log_file_size=0 --max_manifest_file_size=1073741824 --max_sequential_skip_in_iterations=8 --max_total_wal_size=0 --max_write_batch_group_size_bytes=16 --max_write_buffer_number=10 --max_write_buffer_size_to_maintain=0 --memtable_insert_hint_per_batch=0 --memtable_max_range_deletions=100 --memtable_prefix_bloom_size_ratio=0.1 --memtable_protection_bytes_per_key=4 --memtable_whole_key_filtering=0 --memtablerep=skip_list --metadata_charge_policy=1 --metadata_read_fault_one_in=32 --metadata_write_fault_one_in=128 --min_write_buffer_number_to_merge=2 --mmap_read=1 --mock_direct_io=False --nooverwritepercent=1 --num_file_reads_for_auto_readahead=2 --open_files=500000 --open_metadata_read_fault_one_in=8 --open_metadata_write_fault_one_in=0 --open_read_fault_one_in=0 --open_write_fault_one_in=16 --ops_per_thread=100000000 --optimize_filters_for_hits=0 --optimize_filters_for_memory=1 --optimize_multiget_for_io=0 --paranoid_file_checks=1 --partition_filters=0 --partition_pinning=0 --pause_background_one_in=10000 --periodic_compaction_seconds=0 --prefix_size=7 --prefixpercent=5 --prepopulate_block_cache=1 --preserve_internal_time_seconds=36000 --progress_reports=0 --promote_l0_one_in=0 --read_amp_bytes_per_bit=0 --read_fault_one_in=0 --readahead_size=0 --readpercent=45 --recycle_log_file_num=1 --reopen=0 --report_bg_io_stats=0 --reset_stats_one_in=10000 --sample_for_compression=5 --secondary_cache_fault_one_in=32 --set_options_one_in=10000 --skip_stats_update_on_db_open=1 --snapshot_hold_ops=100000 --soft_pending_compaction_bytes_limit=68719476736 --sqfc_name=foo --sqfc_version=0 --sst_file_manager_bytes_per_sec=104857600 --sst_file_manager_bytes_per_truncate=0 --stats_dump_period_sec=600 --stats_history_buffer_size=1048576 --strict_bytes_per_sync=1 --subcompactions=3 --sync=0 --sync_fault_injection=0 --table_cache_numshardbits=6 --target_file_size_base=524288 --target_file_size_multiplier=2 --test_batches_snapshots=0 --test_cf_consistency=1 --top_level_index_pinning=1 --uncache_aggressiveness=0 --universal_max_read_amp=0 --unpartitioned_pinning=0 --use_adaptive_mutex=0 --use_adaptive_mutex_lru=1 --use_attribute_group=0 --use_delta_encoding=1 --use_direct_io_for_flush_and_compaction=0 --use_direct_reads=0 --use_full_merge_v1=0 --use_get_entity=1 --use_merge=0 --use_multi_cf_iterator=0 --use_multi_get_entity=0 --use_multiget=0 --use_put_entity_one_in=0 --use_sqfc_for_range_queries=1 --use_timed_put_one_in=1 --use_write_buffer_manager=1 --user_timestamp_size=0 --value_size_mult=32 --verification_only=0 --verify_checksum=1 --verify_checksum_one_in=1000 --verify_compression=1 --verify_db_one_in=100000 --verify_file_checksums_one_in=1000 --verify_iterator_with_expected_state_one_in=0 --verify_sst_unique_id_in_manifest=1 --wal_bytes_per_sync=0 --wal_compression=none --write_buffer_size=1048576 --write_dbid_to_manifest=0 --write_fault_one_in=128 --writepercent=35
```

Reviewed By: cbi42

Differential Revision: D60938952

Pulled By: hx235

fbshipit-source-id: 5696cd6b00f33c9f9a256944fecb4e2f4d52a2e6

utilities/checkpoint/checkpoint_impl.cc

@@ -53,7 +53,10 @@ Status CheckpointImpl::CleanStagingDirectory(
   if (s.IsNotFound()) {
     // Nothing to clean
     return Status::OK();
+  } else if (!s.ok()) {
+    return s;
   }
+  assert(s.ok());
   ROCKS_LOG_INFO(info_log, "File exists %s -- %s", full_private_path.c_str(),
                  s.ToString().c_str());