Right now the MTT can only run the test cases related to cert-manager against 4.12 on a newer version of OCP, we need to improve that and be able to run those tests against others OCP version as we do in other test cases, for example:
https://github.com/maistra/maistra-test-tool/blob/main/pkg/metallb/install.go#L25
https://github.com/maistra/maistra-test-tool/blob/main/pkg/metallb/yaml/metallb-operator.yaml#L27