Add more Die func for Workload Spec and Status

[shashwathi]

Description of problem

Currently the codebase contains lot of repeated code in dies(generating fakes) for the WorkloadSpec and WorkloadStatus. This can be done better by adding some helper func to set some fields.

[heyjcollins]

Not migrated because this hasn't been picked up to-date and assuming lack of traction for value or feasibility.
If eng disagrees, let's talk.