Apart from validating the correctness of individual fields, the operator ensure that relationships between values in
different parts of the configuration tree are correct. For example, it's an error to enable a component while its
parent feature is disabled.

## K8s controller

TODO(rcernich).

## Manifest creation

	validateReferentialIntegrity(t, objsRev, "istiod-canary", istiodCanary16Selector)

	t.Run("cross revision", func(t *testing.T) {
		// Istiod revisions have complicated cross revision implications. We should assert these are correct
		// First we fetch all the objects for our default install
		cname := "istiod"
		deployment := mustFindObject(t, objs, cname, name.DeploymentStr)
		service := mustFindObject(t, objs, cname, name.ServiceStr)