Proposal for Implementing Multiple Broker Deployment Strategies in Akri

[kate-goldenring]

This document discusses how to add support for multiple broker deployment strategies in Akri. It ultimately
proposes a phased approach with 5 phases of building up the Configuration CRD, Instance CRD, Agent,
and Controller to support all strategies. It assumes the support of terminating Pods via Jobs.

References #17 for background on implementing Job Brokers.

[kate-goldenring]

This document should be broken down into several separate proposals:

1. Requesting resources on the Configuration level (ie: ip-camera: 2 vs ip-camera-instance-id1: 1, ip-camera-instance-id2: 1
2. Splitting the Configuration CRD into a discovery Configuration and deployment Configuration
3. Multiple Configurations mapping to the same Instance (ie: one configuration to deploy a frame server to each camera and another to do a firmware update on the cameras)
4. More deployment strategies