🌱 Download golangci-lint instead of building it

To reduce our go.mod/go.sum in our hack/tools folder, and to always make
sure to sync golangci-lint version between our GitHub Action and our
Makefile, this changeset introduces a way to download golangci-lint
using their published download script.

For now, we opted to copy the download script to avoid downloading it
over the wire and then executing it.

Signed-off-by: Vince Prignano <vincepri@vmware.com>

Makefile

@@ -178,9 +178,6 @@ clusterctl: ## Build clusterctl binary
 $(CONTROLLER_GEN): $(TOOLS_DIR)/go.mod # Build controller-gen from tools folder.
 	cd $(TOOLS_DIR); go build -tags=tools -o $(BIN_DIR)/controller-gen sigs.k8s.io/controller-tools/cmd/controller-gen
 
-$(GOLANGCI_LINT): $(TOOLS_DIR)/go.mod # Build golangci-lint from tools folder.
-	cd $(TOOLS_DIR); go build -tags=tools -o $(BIN_DIR)/golangci-lint github.com/golangci/golangci-lint/cmd/golangci-lint
-
 $(GOTESTSUM): $(TOOLS_DIR)/go.mod # Build gotestsum from tools folder.
 	cd $(TOOLS_DIR); go build -tags=tools -o $(BIN_DIR)/gotestsum gotest.tools/gotestsum
 
@@ -196,9 +193,14 @@ $(GO_APIDIFF): $(TOOLS_DIR)/go.mod
 $(ENVSUBST): $(TOOLS_DIR)/go.mod
 	cd $(TOOLS_DIR) && go build -tags=tools -o $(ENVSUBST_BIN) github.com/drone/envsubst/v2/cmd/envsubst
 
-$(KUSTOMIZE): # Build kustomize from tools folder.
+$(KUSTOMIZE): # Download kustomize using hack script into tools folder.
 	hack/ensure-kustomize.sh
 
+$(GOLANGCI_LINT): .github/workflows/golangci-lint.yml # Download golanci-lint using hack script into tools folder.
+	hack/ensure-golangci-lint.sh \
+		-b $(TOOLS_DIR)/$(BIN_DIR) \
+		$(shell cat .github/workflows/golangci-lint.yml | grep version | sed 's/.*version: //')
+
 envsubst: $(ENVSUBST) ## Build a local copy of envsubst.
 kustomize: $(KUSTOMIZE) ## Build a local copy of kustomize.
 controller-gen: $(CONTROLLER_GEN) ## Build a local copy of controller-gen.