Include postgres operator as optional component

[rjferguson21]

For testing components that require a Postgres database it would be nice to just include the operator as an optional component

[mjnagel]

I think this would make sense to add as optional. It might also make a lot of sense to switch minio to optional at the same time - in a lot of dev/CI environments it's probably just extra bloat that isn't used (ex: most uds-core single pkg tests)?

[zachariahmiller]

Minio is definitely extra bloat. The postgres operator would be as well. The only issue i see with this approach though is that if either are included in this package specifically it cant be done in a way that properly integrates with istio, which makes testing against the minio or postgres not representative of what it would be in a real environment. If they were being exposed public to the cluster it would mimic and external resource, but not sure what the desire is for that.