Retire ms.service: "iot-hub-device-update"

[v-alje]

This is a bulk update to change ms.service: "iot-hub-device-update" to ms.service: "iot-hub" and add ms.subservice: "device-update-for-iot-hub" per ceapex Allow List request: 580461

[opbld30]

Docs Build status updates of commit c796109:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
docfx.json	:white_check_mark:Succeeded

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