[3.13] pythongh-132515: de-duplicate test_dataclass_derived_generic_from_slotted_base (pythonGH-132516) (python#132518)

pythongh-132515: de-duplicate `test_dataclass_derived_generic_from_slotted_base` (pythonGH-132516)
(cherry picked from commit 45c447b)

Co-authored-by: Bénédikt Tran <[email protected]>

Author: miss-islington

Lib/test/test_dataclasses/__init__.py

@@ -3590,7 +3590,6 @@ class A(Base):
         a_ref = weakref.ref(a)
         self.assertIs(a.__weakref__, a_ref)
 
-
     def test_dataclass_derived_weakref_slot(self):
         class A:
             pass
@@ -3670,7 +3669,7 @@ class F[T2](WithSlots):
         self.assertTrue(F.__weakref__)
         F()
 
-    def test_dataclass_derived_generic_from_slotted_base(self):
+    def test_dataclass_derived_generic_from_slotted_base_with_weakref(self):
         T = typing.TypeVar('T')
 
         class WithWeakrefSlot: