Skip tests that sometimes hang the CI

Tested with `act`.

Author: fanninpm

Lib/test/lock_tests.py

@@ -128,6 +128,7 @@ def f():
         self.assertFalse(result[0])
         lock.release()
 
+    @unittest.skip("TODO: RUSTPYTHON, sometimes hangs")
     def test_acquire_contended(self):
         lock = self.locktype()
         lock.acquire()

Lib/test/test_importlib/test_locks.py

@@ -87,6 +87,7 @@ def f():
         self.assertEqual(len(results), NTHREADS)
         return results
 
+    @unittest.skip("TODO: RUSTPYTHON, sometimes hangs")
     def test_deadlock(self):
         results = self.run_deadlock_avoidance_test(True)
         # At least one of the threads detected a potential deadlock on its