Add fsspec gen ai upload hook

[aabmass]

Description

Follow up to #3752. Implements an uploader with fsspec (optional dependency) to gen AI utils. fsspec generically supports many cloud and local backends like /path/on/disk, gs://, s3://..., etc. This PR contains the entry point, environment variable for configuring, queueing, and uploading. Next PR will add refs to telemetry.

Part of #3065, #3753

Example usage

export OTEL_INSTRUMENTATION_GENAI_UPLOAD_HOOK=fsspec

# s3 with configuration https://filesystem-spec.readthedocs.io/en/latest/features.html#configuration
export OTEL_INSTRUMENTATION_GENAI_UPLOAD_BASE_PATH="s3://foo/bar"
export FSSPEC_S3='{"anon": false, "key": "YOUR_ACCESS_KEY", "secret": "YOUR_SECRET_KEY", "client_kwargs": {"endpoint_url": "http://localhost:9000"}}'

# local dir
export OTEL_INSTRUMENTATION_GENAI_UPLOAD_BASE_PATH="/tmp/prompts"

opentelemetry-instrument my-agent.py

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Added tests for the entry point, optional dependency handling, and queueing.

Does This PR Require a Core Repo Change?

• No.

Checklist:

See contributing.md for styleguide, changelog guidelines, and more.

• Followed the style guidelines of this project
• Changelogs have been updated - will add once the feature is complete
• Unit tests have been added
• Documentation has been updated