[FEATURE]Add "Service Time" Measurement in opensearch-py

[saimedhi]

Is your feature request related to a problem?

Opensearch-py currently lacks service time measurement functionality, hindering performance analysis.

What solution would you like?

I propose adding service time measurement functionality to opensearch-py, returning service time data conditionally upon user request.

• I haven't found a Pythonic solution for this yet. Any guidance in this regard would be greatly appreciated.
• I'm exploring various approaches and will update with draft PRs soon.

By service time, I refer to the duration between sending the request to the server and receiving the response.

[saimedhi]

Need to add support for async client