* Added the ability to set the telemetry level for an unattended install
Added 'UnattendedTelemetryLevel' to 'UnattendedSettings'
Renamed 'CreateUnattendedUserNotificationHandler' to 'PostUnattendedInstallNotificationHandler'
Set the telemetry level in the unattended install notification handler
* Add DefaultValue attribute to 'UnattendedTelemetryLevel'
* Added UnattendedTelemetryLevel to template.
* Updated cli and ide hosts.
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Co-authored-by: Andy Butland <abutland73@gmail.com>