As part of fixing OCPBUGS-50587 we need to create a CEL validation rule that makes use of the optionalOldSelf functionality that exists for x-kubernetes-validations on a CRD property.

This functionality was introduced in upstream controller-tools in https://github.com/kubernetes-sigs/controller-tools/pull/1150 

It was merged to our fork in https://github.com/openshift/kubernetes-sigs-controller-tools/pull/26

In order to make use of this new functionality without using manual overrides, we need to update the openshift/api tools go.mod to point to the correct openshift/controller-tools commit.
    

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