[#99] Fix CI: pin setup-envtest for golang 1.21 compatibility

.gitlab-ci.yml

@@ -19,5 +19,7 @@ variables:
 GoTest:
   stage: test
   image: golang:1.21
+  variables:
+    ACK_GINKGO_DEPRECATIONS: 1.16.4
   script:
     - make test

Makefile

@@ -34,7 +34,7 @@ ENVTEST := $(GOBIN)/setup-envtest
 ENVTEST_K8S_VERSION = 1.21
 # Download setup-envtest locally if necessary
 setup-envtest-bin:
-	go install sigs.k8s.io/controller-runtime/tools/setup-envtest@latest
+	go install sigs.k8s.io/controller-runtime/tools/setup-envtest@release-0.17
 	ls -l $(GOBIN)
 	$(ENVTEST) use ${ENVTEST_K8S_VERSION}