[FEATURE] Add OpenTelemetry support

[dacevedo12]

Is your feature request related to a problem?

Currently there is no OpenTelemetry instrumentation for the OpenSearch python client.

A good telemetry setup can aid developers to better monitor and diagnose issues with the requests being performed from their apps against an OpenSearch instance.

What solution would you like?

Something similar to elastic/elasticsearch-py#2435

What alternatives have you considered?

There was a proposal to handle this by the community via monkeypatching open-telemetry/opentelemetry-python-contrib#1131 but has not gained any traction.

Official support has the advantage of having the telemetry instrumentation evolve with the code of the client itself.

[juansedo]

Also, semantic conventions can look like Elasticsearch for third party support.

[dblock]

Would love this! Does anyone care to contribute?

We can go the elastic route, but as always please make sure not to be copying/looking at any non-APLv2 compatible code.