HDDS-11420. OM rocksdb manual WAL flush control

[sumitagrawl]

What changes were proposed in this pull request?

Capability is added to disable WAL manual flush of rocksdb for OM. There is no change in behavior but added for performance test purpose. As ratis log itself provide recovery, WAL log provide duplicate mechanism. This is added for planned for Leader Side execution of request as performance optimization.

Parent JIRA: https://issues.apache.org/jira/browse/HDDS-11415

What is the link to the Apache JIRA

https://issues.apache.org/jira/browse/HDDS-11420

How was this patch tested?

• Existing test scenario

[errose28]

This looks related to #7150. Once Ozone supports RocksDB INI files we should not need to propagate RocksDB configs up to Ozone, but instead can ship with default RocksDB config files that contain our recommended practices. Since we don't need this in master immediately, I would wait until that switch to INI files completes.

[kerneltime]

If this config is set to false, when does the WAL flush occur and how is it triggered?

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