Updated deprecated typing imports with equivalents for Python 3.9+ (#38546)

* Replace deprecated typing imports with collections.abc equivalents for Python 3.9+

* Fixed code quality

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Co-authored-by: Yih-Dar <2521628+ydshieh@users.noreply.github.com>

examples/pytorch/3d_parallel_checks.py

@@ -31,8 +31,9 @@ ocalhost:29504 test_train.py
 
 import logging
 import os
+from collections.abc import Iterable
 from contextlib import nullcontext
-from typing import Dict, Iterable, Optional
+from typing import Dict, Optional
 
 import torch
 import torch.distributed as dist