Look into moving away from use of status.phase field on Catalog API

[joelanford]

          As a side effect related to this PR: Phase is deprecated in [the API conventions](https://github.com/kubernetes/community/blob/master/contributors/devel/sig-architecture/api-conventions.md).

"Some resources in the v1 API contain fields called phase, and associated message, reason, and other status fields. The pattern of using phase is deprecated. Newer API types should use conditions instead. Phase was essentially a state-machine enumeration field, that contradicted system-design principles and hampered evolution, since adding new enum values breaks backward compatibility. Rather than encouraging clients to infer implicit properties from phases, we prefer to explicitly expose the individual conditions that clients need to monitor. Conditions also have the benefit that it is possible to create some conditions with uniform meaning across all resource types, while still exposing others that are unique to specific resource types. See #7856 for more details and discussion."

Originally posted by @fgiloux in #174 (comment)