[3.11] gh-106883: Increase timeout for a test_sys test

On some platforms the test test_current_frames_exceptions_deadlock
goes in timeout when CPython is built with debug.
The execution time of the test is about 4x and the current timeout is
not enough to complete the test.

Author: diegorusso

Lib/test/test_sys.py

@@ -518,10 +518,12 @@ def thread_function(num_objects):
         NUM_OBJECTS = 1000
         NUM_THREADS = 10
 
-        # 40 seconds should be enough for the test to be executed: if it
-        # is more than 40 seconds it means that the process is in deadlock
-        # hence the test fails
-        TIMEOUT = 40
+        # 160 seconds should be enough for the test to be executed: if it
+        # is more than 160 seconds it means that the process is in deadlock
+        # hence the test fails.
+        # The timeout is high because on older platforms it takes some time
+        # for the test to be executed when CPython is built with debug flags.
+        TIMEOUT = 160
 
         # Test the sys._current_frames and sys._current_exceptions calls
         pid = os.fork()