[BUG] `deprecated` library missing from `install_requires` list

[miguelsousa]

What is the bug? The deprecated library is used in ml_commons_client.py but opensearch-py-ml doesn't install it by default.

How can one reproduce the bug? Steps to reproduce the behavior:

1. Install opensearch-py-ml
2. Use from opensearch_py_ml.ml_commons import MLCommonClient in your code
3. ModuleNotFoundError happens

   Traceback (most recent call last):
   File "client.py", line 24, in <module>
   from opensearch_py_ml.ml_commons import MLCommonClient
   File "lib/python3.10/site-packages/opensearch_py_ml/ml_commons/__init__.py", line 10, in <module>
   from opensearch_py_ml.ml_commons.ml_commons_client import MLCommonClient
   File "lib/python3.10/site-packages/opensearch_py_ml/ml_commons/ml_commons_client.py", line 13, in <module>
   from deprecated.sphinx import deprecated
   ModuleNotFoundError: No module named 'deprecated'

What is the expected behavior? No crash.

Proposed fix Add deprecated to install_requires in setup.py.

[Vinay-Vinod]

Can I be assigned to this issue?

[dhrubo-os]

Sure, assigning it to you.

[wuzhijing0127]

Can I be assigned to this issue?

[dhrubo-os]

@wuzhijing0127 this issue is already assigned to @Vinay-Vinod and he also raised a PR. Please ping me if you don't see any other issue. Thanks.