Add log and metrics provider to langchain

[wrisa]

Description

Add log and metrics provider in langchain's call to genai utils telemetry handler.

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

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

• Test A

Does This PR Require a Core Repo Change?

• Yes. - Link to PR:
• No.

Checklist:

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

• Followed the style guidelines of this project
• Changelogs have been updated
• Unit tests have been added
• Documentation has been updated

[pmcollins]

Production code changes are quite small and they LGTM. Kudos for thorough testing, but IMO, if they don't already, these tests should live in genai utils rather than here, as they are testing that code. For this PR, I think a spot check or even just a test that verifies the provider wiring would suffice.

edit: I'll approve this PR. Production code changes are fine from my perspective, and it has thorough integration tests -- where they should live may be a matter of personal preference.

[JWinermaSplunk]

Looks good, though I do agree with the comment @nagkumar91 left

[aabmass]

Can you update the spellcheck config? https://github.com/open-telemetry/opentelemetry-python-contrib/blob/main/.codespellrc