gh-108303: Move more typing related files to Lib/test/typinganndata (#111825)

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>

Lib/test/typinganndata/mod_generics_cache.py

@@ -0,0 +1,24 @@
+"""Module for testing the behavior of generics across different modules."""
+
+from typing import TypeVar, Generic, Optional, TypeAliasType
+
+default_a: Optional['A'] = None
+default_b: Optional['B'] = None
+
+T = TypeVar('T')
+
+
+class A(Generic[T]):
+    some_b: 'B'
+
+
+class B(Generic[T]):
+    class A(Generic[T]):
+        pass
+
+    my_inner_a1: 'B.A'
+    my_inner_a2: A
+    my_outer_a: 'A'  # unless somebody calls get_type_hints with localns=B.__dict__
+
+type Alias = int
+OldStyle = TypeAliasType("OldStyle", int)