[FunctionGraph] Make trigger/binding nodes clickable as well

[scale-tone]

At the moment, orchestration/entity/activity nodes are clickable and lead to their implementations in source code.

Would be great to implement the same thing for trigger/binding nodes. Clicking on a binding should open its corresponding resource (blob container, queue, topic, event hub etc.) blade in Azure Portal.

Constructing a link to Azure Portal blade requires knowledge of:

• Tenant Name
• Azure SubscriptionID
• Resource Group Name

Let's try to infer these values from Function App instance and/or from local.settings.json.

[scale-tone]

Partially completed in v6.0