[3.11] gh-106016: Add Lib/test/test_module/ directory (GH-108293) (#108304)

gh-106016: Add Lib/test/test_module/ directory (GH-108293)

* Move Python scripts related to test_module to this new directory:
  good_getattr.py and bad_getattrX.py scripts.
* Move Lib/test/test_module.py to Lib/test/test_module/__init__.py.
(cherry picked from commit adfc118fda)

Co-authored-by: Victor Stinner <vstinner@python.org>

Lib/test/test_module/good_getattr.py

@@ -0,0 +1,11 @@
+x = 1
+
+def __dir__():
+    return ['a', 'b', 'c']
+
+def __getattr__(name):
+    if name == "yolo":
+        raise AttributeError("Deprecated, use whatever instead")
+    return f"There is {name}"
+
+y = 2