Fix golangci-lint target for non GOPATH installations (#12934)

* Fix golangci-lint target for non GOPATH installations

* Link to https://github.com/golangci/golangci-lint#install

Makefile

@@ -173,17 +173,15 @@ gofmt: ## Runs gofmt against all packages.
 	done
 	@echo "gofmt success"; \
 
-golangci-lint:
+golangci-lint: ## Run golangci-lint on codebasis
 # https://stackoverflow.com/a/677212/1027058 (check if a command exists or not)
-# https://github.com/golangci/golangci-lint#binary-release
-# It is recommended to NOT use go get, but instead use a binary release pinned to a version.
-	@if ! [ -x "$$(command -v golangci-lint)" ]; then \
-		echo "golangci-lint is not installed. Please run: curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh| sh -s -- -b $(GOPATH)/bin v1.21.0"; \
+	@if ! [ -x "$$(command -v golangci-lintt)" ]; then \
+		echo "golangci-lint is not installed. Please see https://github.com/golangci/golangci-lint#install for installation instructions."; \
 		exit 1; \
 	fi; \
 
 	@echo Running golangci-lint
-	$(GOPATH)/bin/golangci-lint run
+	golangci-lint run
 
 megacheck: ## Run megacheck on codebasis
 	env GO111MODULE=off go get -u honnef.co/go/tools/cmd/megacheck