INTPYTHON-701 - Use PyMongo Asynchronous API instead of Motor

[NoahStapp]

Description

Motor is officially deprecated in favor of the asynchronous API added to PyMongo in 4.13: https://github.com/mongodb/motor. This PR replaces Motor with that API in all LlamaIndex MongoDB integrations and updates dependencies accordingly.

Version Bump?

Did I bump the version in the pyproject.toml file of the package I am updating? (Except for the llama-index-core package)

• Yes
• No

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?

Your pull-request will likely not be merged unless it is covered by some form of impactful unit testing.

• I added new unit tests to cover this change
• I believe this change is already covered by existing unit tests

Suggested Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added Google Colab support for the newly added notebooks.
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I ran uv run make format; uv run make lint to appease the lint gods

[NoahStapp]

Passing tests in our testing pipeline repo: mongodb-labs/ai-ml-pipeline-testing#101.

[blink1073]

LGTM!

[caseyclements]

Hi @logan-markewich. This is a small upgrade as our core python driver, pymongo, now contains an asynchronous client. We are deprecating motor. Would you please review?

[caseyclements]

Thanks @logan-markewich!