Add py_builtins and py_internal helper namespaces in Bazel to allow Starlark to use Java helpers

* `py_builtins` is an Starlark builtins-internal-only namespace for functions
  that only builtins should use.
* `py_internal` is for regular Starlark for testing and other esoteric
   purposes. Usage of this is restricted to packages relating to the rule
   implementations to prevent using these internal APIs.

(These already exist in the Google-internal build; this makes them defined
in Bazel, too, though they're currently no-ops; followup CLs will begin moving
common code out of the Google-py_internal and into the common one).

Work towards #15897

PiperOrigin-RevId: 485146419
Change-Id: I71902e60471a4227c1993778bda60cbbe6e316f0
7 files changed
tree: 83222a6daf7352404a6122047ca1daebb2f0360d
  1. .bazelci/
  2. .github/
  3. examples/
  4. scripts/
  5. site/
  6. src/
  7. third_party/
  8. tools/
  9. .bazelrc
  10. .gitattributes
  11. .gitignore
  12. AUTHORS
  13. BUILD
  14. CHANGELOG.md
  15. CODE_OF_CONDUCT.md
  16. CODEOWNERS
  17. combine_distfiles.py
  18. combine_distfiles_to_tar.sh
  19. compile.sh
  20. CONTRIBUTING.md
  21. CONTRIBUTORS
  22. distdir.bzl
  23. distdir_deps.bzl
  24. LICENSE
  25. MODULE.bazel
  26. README.md
  27. SECURITY.md
  28. WORKSPACE
  29. WORKSPACE.bzlmod
README.md

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