chore: use appinsights pkg for isolated az func

[stijnmoreels]

Use preview Application Insights NuGet package for isolated Azure Functions applications to fix the automatic dependency tracking and Arcus telemetry.

Relates to arcus-azure/arcus.observability#359

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[fgheysels]

Just wondering if we should look at this further: Azure/azure-functions-dotnet-worker#1263 (comment)

[stijnmoreels]

Just wondering if we should look at this further: Azure/azure-functions-dotnet-worker#1263 (comment)

Yes, actually hope that they answer me on this so we can use the preferred approach.

[fgheysels]

Don't know if we still need to do something here ?

[stijnmoreels]

Don't know if we still need to do something here ?

Also don't know 😄

[stijnmoreels]

Think this is done, as it only updates the packages and related YAML files.
@fgheysels