remove the wait-for-postgres init container on api template - SKIP UPGRADE

The init container causes a compatibility issue with istio. The init container tries to connect to postgres before the istio sidecar container can be created, preventing the container connecting. Couldn't find an easy workaround, so just removing the init container since it isn't strictly required. The api pod will fail temporarily until postgres is fully available, but the auto restart will cause it to eventually reach a successful state.