Support enabling FUA and Sync Cache SCSI commands

[vaskozl]

https://www.synology.com/en-uk/releaseNote/ScsiTarget

Added support for FUA and Sync Cache SCSI commands to lower the risk of data loss or file system crash.

This option is disabled for LUNs created by the CSI driver.

As I understand these commands decrease the likeliness of corruption and we should be able to enable them.

[travisghansen]

At my project over here the create api methods are fully templatable so assuming those properties can be set via the api at creation time you could control them: https://github.com/democratic-csi/democratic-csi/blob/master/examples/synology-iscsi.yaml