[BUG] Async helpers cannot be imported due to import cycle

[aiudirog]

What is the bug?

Async helpers cannot be imported due to an import cycle

How can one reproduce the bug?

Attempt to import async_scan from opensearchpy.helpers and an ImportError will be raised

What is the expected behavior?

async_scan() should be imported and available to use

What is your host/environment?

• Windows 10 - Python 3.10.6
• Arch Linux (6.1.12-zen1-1-zen) - Python 3.10.9

Do you have any screenshots?

➜ python -c "from opensearchpy.helpers import async_scan"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: cannot import name 'async_scan' from 'opensearchpy.helpers' (/home/roger/.local/lib/python3.10/site-packages/opensearchpy/helpers/__init__.py)

If I remove the try block around async imports in opensearchpy/helpers/__init__.py:

➜ python -c "from opensearchpy.helpers import async_scan"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/roger/.local/lib/python3.10/site-packages/opensearchpy/__init__.py", line 46, in <module>
    from .client import OpenSearch
  File "/home/roger/.local/lib/python3.10/site-packages/opensearchpy/client/__init__.py", line 33, in <module>
    from ..transport import Transport, TransportError
  File "/home/roger/.local/lib/python3.10/site-packages/opensearchpy/transport.py", line 39, in <module>
    from .serializer import DEFAULT_SERIALIZERS, Deserializer, JSONSerializer
  File "/home/roger/.local/lib/python3.10/site-packages/opensearchpy/serializer.py", line 39, in <module>
    from .helpers.utils import AttrList
  File "/home/roger/.local/lib/python3.10/site-packages/opensearchpy/helpers/__init__.py", line 60, in <module>
    from .._async.helpers import (
  File "/home/roger/.local/lib/python3.10/site-packages/opensearchpy/_async/helpers.py", line 44, in <module>
    from .client import AsyncOpenSearch  # noqa
  File "/home/roger/.local/lib/python3.10/site-packages/opensearchpy/_async/client/__init__.py", line 32, in <module>
    from ..transport import AsyncTransport, TransportError
  File "/home/roger/.local/lib/python3.10/site-packages/opensearchpy/_async/transport.py", line 40, in <module>
    from ..serializer import JSONSerializer
ImportError: cannot import name 'JSONSerializer' from partially initialized module 'opensearchpy.serializer' (most likely due to a circular import) (/home/roger/.local/lib/python3.10/site-packages/opensearchpy/serializer.py)

Do you have any additional context?

This issue is new in v2.2.0