Upgrade to a version lower than 4.16 is blocked due to weak SHA1 signature algorithm

Issue

Upgrade is blocked due to the error:

  - lastTransitionTime: "2024-10-17T07:52:49Z"
    message: 'Cluster operator ingress should not be upgraded between minor versions:
      Some ingresscontrollers are not upgradeable: ingresscontroller "default" is
      not upgradeable: OperandsNotUpgradeable: One or more managed resources are not
      upgradeable: certificate in secret openshift-ingress/router-certs-default-v4
      has weak SHA1 signature algorithm: SHA1-RSA (see https://docs.openshift.com/container-platform/4.16/release_notes/ocp-4-16-release-notes.html#ocp-4-16-sha-haproxy-support-removed_release-notes
      for more details)'
    reason: IngressControllersNotUpgradeable
    status: "False"
    type: Upgradeable