Description of problem:
Setup operator should use the latest release image to setup quay and clair by default

Version-Release number of selected component (if applicable):
quay.io/quay/quay-rhel8-operator@sha256:a76dbef6515a9b354dbfa1484577907e8bcd1b638f9989b24011e562e94df570

How reproducible:
Always

Steps to Reproduce:
1.Install setup operator
2.Create quayecosystem CR wtihout any value

apiVersion: redhatcop.redhat.io/v1alpha1
kind: QuayEcosystem
metadata:
  name: default-quay
spec:
  quay:
    imagePullSecretName: redhat-pull-secret
  clair:
    enabled: true
    imagePullSecretName: redhat-pull-secret

3.Check pod status

Actual results:
Quay and Clair running with candidate images 'quay.io/quay/quay:v3.3.0-2' , 'quay.io/quay/clair-jwt:v3.3.0-1'

Expected results:
Should use the latest release images

Additional info: