AKS Application Lifecycle Provider

[anthturner]

This is one of the more requested providers but it will also be very difficult for similar reasons to the AppServices providers, in that it needs to implement interlocked rotation.

[anthturner]

What needs to be done at a high level, from @jwendl --

• Update destination key with secondary key
• Rev the container and create a matching pair of instances for the application (if the app has 3 instances, create 3 more to make 6)
• Move ingress to the second set of 3
• Test that the change worked
• Permanently move ingress to the second set of 3
• Delete original 3 instances
• Rotate/dispose of original key

[anthturner]

This is a big-time "help wanted" because I'm wholly unfamiliar with the k8s .NET SDK.