write all failed test into the quickfix list

tests/tmp_qf_go_union/foo_union_test.go

@@ -0,0 +1,9 @@
+package foo
+
+func TestAwesomeThing(t *testing.T) {
+  t.Run("evergreen", func(t *testing.T) {
+  })
+
+  t.Run("everred", func(t *testing.T) {
+  })
+}