gh-108416: Mark slow test methods with @requires_resource('cpu') (GH-108421)

Only mark tests which spend significant system or user time,
by itself or in subprocesses.

Lib/test/test_builtin.py

@@ -952,6 +952,7 @@ class BuiltinTest(unittest.TestCase):
             f2 = filter(filter_char, "abcdeabcde")
             self.check_iter_pickle(f1, list(f2), proto)
 
+    @support.requires_resource('cpu')
     def test_filter_dealloc(self):
         # Tests recursive deallocation of nested filter objects using the
         # thrashcan mechanism. See gh-102356 for more details.