fix huma integration env parity

Author: julianknutsen

test/integration/huma_binary_test.go

@@ -44,10 +44,7 @@ func TestHumaBinary_SupervisorBootsAndServesSpec(t *testing.T) {
 	}
 
 	baseURL := "http://127.0.0.1:" + strconv.Itoa(port)
-	env := append(os.Environ(),
-		"GC_HOME="+gcHome,
-		"XDG_RUNTIME_DIR="+runtimeDir,
-	)
+	env := integrationEnvFor(gcHome, runtimeDir, true)
 
 	ctx, cancel := context.WithCancel(context.Background())
 	t.Cleanup(cancel)