Makefile: run tests as root without building as root

Using the go binary -exec flag to execute the test binary using an
arbitrary sudo command instead of executing the whole toolchain as root.
This is a very small security change but why not!

Signed-off-by: Mahe Tardy <mahe.tardy@gmail.com>

Makefile

@@ -218,11 +218,11 @@ clean: cli-clean tarball-clean
 
 .PHONY: test
 test: tester-progs tetragon-bpf
-	$(SUDO) $(GO) test -p 1 -parallel 1 $(GOFLAGS) -gcflags=$(GO_BUILD_GCFLAGS) -timeout $(GO_TEST_TIMEOUT) -failfast -cover ./pkg/... ./cmd/... ./operator/... ${EXTRA_TESTFLAGS}
+	$(GO) test -exec "$(SUDO)" -p 1 -parallel 1 $(GOFLAGS) -gcflags=$(GO_BUILD_GCFLAGS) -timeout $(GO_TEST_TIMEOUT) -failfast -cover ./pkg/... ./cmd/... ./operator/... ${EXTRA_TESTFLAGS}
 
 .PHONY: bench
 bench:
-	$(SUDO) $(GO) test -p 1 -parallel 1 -run ^$$ $(GOFLAGS) -gcflags=$(GO_BUILD_GCFLAGS) -timeout $(GO_TEST_TIMEOUT) -failfast -cover ./pkg/... ./cmd/... ./operator/... -bench=. ${EXTRA_TESTFLAGS} 
+	$(GO) test -exec "$(SUDO)" -p 1 -parallel 1 -run ^$$ $(GOFLAGS) -gcflags=$(GO_BUILD_GCFLAGS) -timeout $(GO_TEST_TIMEOUT) -failfast -cover ./pkg/... ./cmd/... ./operator/... -bench=. ${EXTRA_TESTFLAGS}
 
 # Agent image to use for end-to-end tests
 E2E_AGENT ?= "cilium/tetragon:$(DOCKER_IMAGE_TAG)"