set catalog feature flag for integration tests (containerize)

[mkenigs]

• Copy the podman/docker tests in containerize.bats and run them with the catalog feature flag set. Make any small changes required to get them passing
• Set FLOX_FEATURES_USE_CATALOG=true and _FLOX_USE_CATALOG_MOCK=/dev/null for all other containerize tests since they shouldn't be impacted by the catalog
• If anything that isn't minor breaks, skip copied tests and create followup tickets

[zmitchell]

• These probably need to stay integration tests
• From a cursory glance I don't think catalog server is involved at all

[mkenigs]

Need to add 1 mock hello response