Add conditions to owner.status.resource[x]

[emmjohnson]

Changes proposed by this PR

• Add conditions to owner.status.resource[x]
• Remove duplication from errors at realizer/workload/errors.go and realizer/deliverable/errors.go - all errors are now located at errors/errors.go
  • Will do the same for remaining duplicate errors in another PR
• Remove duplication from conditions at controller/workload/conditions.go and controller/deliverable/conditions.go - all conditions are now located at conditions/*
  • Will do the same for remaining duplicate conditions in another PR
• Move workload reconciler and deliverable reconciler to controllers/*
  • Will do the same for remaining reconcilers in another PR

closes #809

Release Note

PR Checklist

Note: Please do not remove items. Mark items as done [x] or use strikethrough if you believe they are not relevant

• Linked to a relevant issue. Eg: Fixes #123 or Updates #123
• Removed non-atomic or wip commits
• Filled in the Release Note section above
• Modified the docs to match changes