[LVsarff]

Description

AzureContainerCodeExecutor.get_available_packages runs a pkg_resources-based snippet inside the ACI container. pkg_resources ships with setuptools, which is not guaranteed to be present in the container's runtime environment, in which case get_available_packages() fails with ModuleNotFoundError. It is also deprecated (recent setuptools emits a DeprecationWarning on import).

This PR replaces the snippet with the standard-library equivalent:

from importlib.metadata import distributions
[d.metadata['Name'] for d in distributions()]

The output format (a repr of a list of package-name strings) is unchanged, so the downstream parsing is unaffected.

Fixes #8419

Checklist

• The change is minimal and behavior-preserving
• Verified the file compiles (python -m py_compile); no unit tests cover this container-side snippet today