[Compute] WriteAcceleratorEnabled, VM instance view update, and vmss force recovery API

[hyonholee]

Adding WriteAcceleratorEnabled property for Disks
Adding ComputerName, OsName and OsVersion properties for VM instance view, and
Adding ForceRecoveryServiceFabricPlatformUpdateDomainWalk API for VM scale set.

Azure/azure-rest-api-specs#2294
Azure/azure-rest-api-specs#2390

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