Extract dependencies from checkpoint

[frazane]

This PR reworks the program used to generate the pyproject.toml file for a given checkpoint.

Summary of changes

• all dependencies information is extracted from the checkpoint and no longer from MLFlow - a requirements.txt is automatically generated from the checkpoint using anemoi-inference inspect --requirements <path-to-checkpoint>
• uv is used to add those dependencies to the pyproject
• the rule "create_inference_pyproject" is updated to use a shell directive instead of a script directive

Note: right now, this requires anemoi-inference to be installed in the evalml virtual environment, which unfortunately comes with some heavy dependencies such as torch. Ideally, commands to interact with the checkpoint should be moved to anemoi-utils. Until then, I would keep this PR as a draft.