dual commit

One of the methods that StorageGRID can use to protect object data during ingest. When an ILM rule specifies that dual commit be used, StorageGRID creates two interim copies on different Storage Nodes and then queues the object for ILM evaluation. The copies specified in the rule's placement instructions are made later, and the interim copies are deleted if they are not necessary. In previous releases, this functionality was the system's default behavior.