Update the SeQuester app to use secretless for the Quest Azure DevOps board instead of PAT authentication

[tdykstra]

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Associated WorkItem - 250813

[adegeo]

@tdykstra We don't really have a workflow yet for fully removed work items, so you'll need to go close the quest work item manually. When you're ready to schedule it again, erase the work item link from the initial issue comment and re-sequester it.