fix: add go get -d sigs.k8s.io/controller-tools/cmd/controller-gen@v0…

….4.1

to update go.mod and download source code needed to build packages.

operator/Makefile

@@ -181,7 +181,8 @@ ifeq (, $(shell which controller-gen))
 	CONTROLLER_GEN_TMP_DIR=$$(mktemp -d) ;\
 	cd $$CONTROLLER_GEN_TMP_DIR ;\
 	go mod init tmp ;\
-	go get sigs.k8s.io/controller-tools/cmd/[email protected] ;\
+	go get -d sigs.k8s.io/controller-tools/cmd/[email protected] ;\
+	go get sigs.k8s.io/controller-tools/cmd/[email protected] ;\
 	rm -rf $$CONTROLLER_GEN_TMP_DIR ;\
 	}
 CONTROLLER_GEN=$(GOBIN)/controller-gen
@@ -196,6 +197,7 @@ ifeq (, $(shell which kustomize))
 	KUSTOMIZE_GEN_TMP_DIR=$$(mktemp -d) ;\
 	cd $$KUSTOMIZE_GEN_TMP_DIR ;\
 	go mod init tmp ;\
+	go get -d sigs.k8s.io/kustomize/kustomize/[email protected] ;\
 	go get sigs.k8s.io/kustomize/kustomize/[email protected] ;\
 	rm -rf $$KUSTOMIZE_GEN_TMP_DIR ;\
 	}