chore: migrate first OC Python projects to uv (SMR-2)

[tschaffter]

Contributes to https://sagebionetworks.jira.com/browse/SMR-2

Description

This PR migrates two OC Python project to the package manager uv.

The projects are:

• openchallenges-data-lambda
• openchallenges-etl-data

Changelog

• Update the Nx plugin for Python and set uv as its preferred package manager.
• Set Python version of openchallenges-data-lambda to 3.13.1.
• Set Python version of openchallenges-edam-etl to 3.12.8.
• Implement openchallenges-data-lambda:serve.
• Update the Dockerfile of openchallenges-data-lambda to use uv.
• Update the Dockerfile of openchallenges-edam-etl to use uv and multi-stage build.
• Add .pdm-build to workspace-level .gitignore.
• Remove more folders with workspace-nuke.

Notes

The Dockerfile of the lambda project was adapted from this example provided by uv.

How to test

1. Checkout this feature branch.
2. Remove .venv and other untracked folders from apps/openchallenges/data-lambda.
3. Run nx prepare openchallenges-data-lambda from the workspace directory.
4. Run the command listed in the apps/openchallenges/data-lambda/README.md to verify that the lambda function works properly.