chore(ci): update golangci-lint and fix script paths

- bump golangci-lint-action to v7 and version to v2.1.6
- correct directory paths in `smoke_test.sh`
- update `test` and `test-ci` targets in Makefile

Makefile

@@ -38,11 +38,11 @@ build-ci: download-tun2socks
 	$(eval GIT_COMMIT := $(shell git rev-parse HEAD 2>/dev/null || echo "unknown"))
 	$(GOBUILD) -ldflags "-s -w -X main.version=$(VERSION) -X main.buildTime=$(BUILD_TIME) -X main.gitCommit=$(GIT_COMMIT)" -o $(BINARY_NAME) -v ./cmd/greywall
 
-test:
+test: download-tun2socks
 	@echo "Running tests..."
 	$(GOTEST) -v ./...
 
-test-ci:
+test-ci: download-tun2socks
 	@echo "CI: Running tests with coverage..."
 	$(GOTEST) -v -race -coverprofile=coverage.out ./...