Use a stable release of setup-envtest

A recent change caused this tool to select the *oldest* Kubernetes
binaries rather than the newest:

  https://www.github.com/kubernetes-sigs/controller-runtime/issues/3379

This entire tool can be dropped when we move to controller-runtime 0.22.x
which has this feature:

  https://www.github.com/kubernetes-sigs/controller-runtime/pull/3280

Author: cbandy

Makefile

@@ -15,7 +15,7 @@ CONTROLLER ?= $(GO) tool sigs.k8s.io/controller-tools/cmd/controller-gen
 CHAINSAW ?= $(GO) run github.com/kyverno/chainsaw@latest
 CHAINSAW_TEST ?= $(CHAINSAW) test
 CRD_CHECKER ?= $(GO) run github.com/openshift/crd-schema-checker/cmd/crd-schema-checker@latest
-ENVTEST ?= $(GO) run sigs.k8s.io/controller-runtime/tools/setup-envtest@latest
+ENVTEST ?= $(GO) run sigs.k8s.io/controller-runtime/tools/setup-envtest@release-0.22
 KUTTL ?= $(GO) run github.com/kudobuilder/kuttl/cmd/kubectl-kuttl@latest
 KUTTL_TEST ?= $(KUTTL) test