Install setuptools via pip in base Docker image

[lantiga]

What does this PR do?

Module pkg_resources has been removed in Python 3.12, this produces

Traceback (most recent call last):
  File "/__w/13/s/requirements/collect_env_details.py", line 24, in <module>
    import pkg_resources
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2172, in <module>
    register_finder(pkgutil.ImpImporter, find_on_path)
                    ^^^^^^^^^^^^^^^^^^^
AttributeError: module 'pkgutil' has no attribute 'ImpImporter'. Did you mean: 'zipimporter'?

This PR manually installs setuptools via pip in the base Docker image, which now provides pkg_resources.
Moving forward we'll need to migrate away from it but not today.

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📚 Documentation preview 📚: https://pytorch-lightning--20487.org.readthedocs.build/en/20487/

[github-actions]

⚡ Required checks status: All passing 🟢

Groups summary

🟢 pytorch_lightning: Docker

Check ID	Status
build-cuda (3.10, 2.1.2, 12.1.0)	success	✅
build-cuda (3.11, 2.2.2, 12.1.0)	success	✅
build-cuda (3.11, 2.3.1, 12.1.0)	success	✅
build-cuda (3.11, 2.4.1, 12.1.0)	success	✅
build-cuda (3.12, 2.5.1, 12.1.0)	success	✅
build-pl (3.10, 2.1, 12.1.0)	success	✅
build-pl (3.11, 2.2, 12.1.0)	success	✅
build-pl (3.11, 2.3, 12.1.0)	success	✅
build-pl (3.11, 2.4, 12.1.0)	success	✅
build-pl (3.12, 2.5, 12.1.0)	success	✅

These checks are required after the changes to dockers/base-cuda/Dockerfile.

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Thank you for your contribution! 💜

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