bpo-34776: Fix dataclasses to support __future__ "annotations" mode (#9518)

diff --git a/Lib/test/dataclass_textanno.py b/Lib/test/dataclass_textanno.py
new file mode 100644
index 0000000..3eb6c94
--- /dev/null
+++ b/Lib/test/dataclass_textanno.py
@@ -0,0 +1,12 @@
+from __future__ import annotations
+
+import dataclasses
+
+
+class Foo:
+    pass
+
+
+@dataclasses.dataclass
+class Bar:
+    foo: Foo