[Tune] Increase tune checkpoint test latency threshold (#56251)

Bumping it to 5s to de-flake.


Signed-off-by: Lehui Liu <[email protected]>

Author: liulehui

python/ray/tune/tests/test_commands.py

@@ -73,7 +73,7 @@ def train_fn(config):
         times += [time.time() - start]
 
     print("Average CLI time: ", sum(times) / len(times))
-    assert sum(times) / len(times) < 2, "CLI is taking too long!"
+    assert sum(times) / len(times) < 5, "CLI is taking too long!"
 
 
 @mock.patch(