Add ability to cancel an update on an individual instance in a running deployment (not a group)

[eshashah-msft]

Need the ability to cancel the deployment for the selected devices in the DU UX portal

From: #179

[PtwHub]

This feature renders ADU usable for vendors of high-end devices (e.g. MedTech) where each device must be treated individually. The reason for this is not only the extent of the update, but also the global time zones and slots available for each device is different because it is in quasi 24/7 clinical "PROD" usage and for reasons of update QA monitoring...