Update test_eintr.py from CPython v3.12.0

Author: NakanoMiku39

Lib/test/test_eintr.py

@@ -9,6 +9,7 @@
 class EINTRTests(unittest.TestCase):
 
     @unittest.skipUnless(hasattr(signal, "setitimer"), "requires setitimer()")
+    @support.requires_resource('walltime')
     def test_all(self):
         # Run the tester in a sub-process, to make sure there is only one
         # thread (for reliable signal delivery).