Produce and Sort List of Instances to be Updated

[webern]

• List container instances in the cluster that are running Bottlerocket. (Check if Bottlerocket has Update Available #5)
• Keep only those that need a Bottlerocket update. (Checking this can be done in parallel.) (also Check if Bottlerocket has Update Available #5)
• Eliminate those that host non-service tasks. (Implement Node Draining and Drain-State Polling #8)
• Sort the list by current version ascending, seed ascending

[samuelkarp]

The first three checkboxes above are covered by other issues. The last one is one that we should do, but doesn't need to be done first.

[webern]

In fact this sort seems extremely low priority to me.