Implement supporting functions for reconcileMachineUpdates

Background

The updates (ie new machines/delete old machines) of the CPMS are relatively complicated and warrant their own cards, however, there are a few TODOs in the updates file that need to be resolved.

Namely:

• Setting the status degraded when an invalid strategy is applied
• Mapping machine infos from a list to a map

The parts to implement for this card are here and here  and the tests are here  and here

Steps

• Review the tests cases and function description to understand what the expected behaviour is
• Implement the behaviour of the function based on prescribed behaviour in the tests
• Ensure linting passes (make lint) and think about the code layout, it is clean?
• Consider any additional tests that may need to be added

Stakeholders

• Cluster Infra (Joel)

Definition of Done

• Supporting functions for Machine update logic are implemented and existing tests are passing

• Docs

• N/A

• Testing

• Existing unit tests pass + any additional tests you can think of