UPSTREAM: <carry>: Add test-e2e target for downstream Makefile to be run by openshift/release.

Signed-off-by: dtfranz <dfranz@redhat.com>

Author: dtfranz

openshift/Makefile

@@ -14,3 +14,7 @@ manifests: $(KUSTOMIZE) $(YQ)
 .PHONY: verify-manifests
 verify-manifests: manifests
 	git diff --exit-code
+
+.PHONY: test-e2e
+test-e2e: ## Run the e2e tests. TODO: stub until tests are working downstream
+	/bin/true