Add flags to disable Apple and Objc configuration fragments.

This change introduces `--incompatible_remove_ctx_apple_fragment` (tracked in #28081) and `--incompatible_remove_ctx_objc_fragment` (tracked in #28082).

When set to true, these flags cause AppleConfiguration and ObjcConfiguration, respectively, to be excluded from the build context, making `ctx.fragments.apple` and `ctx.fragments.objc` undefined. This is a step towards migrating Apple build flags from core Bazel fragments to be defined within Apple rules.

This is precursor work for https://github.com/bazelbuild/rules_apple/issues/2845

Also see:

[Starlarkify Apple flags](https://docs.google.com/document/d/1k2w0QadZUfymFtwCBtdsA6MBs0eExFZ9l08KtFQM4Es/edit?tab=t.0#heading=h.9wqxvqh3dnld)
[Starlarkify native Bazel flags](https://docs.google.com/document/d/1yOvi4hVV7Ja32ocwVb4lsEUnijftk8nilXPncYm-BH8/edit?tab=t.0#heading=h.5mcn15i0e1ch) (proposal)

Closes #28083.

PiperOrigin-RevId: 854027377
Change-Id: Ida013755c28656c3017960a4cc1909a08f9085bc
5 files changed
tree: df41df144738f4e3f506d92b4bfa17eedd5151fe
  1. .bazelci/
  2. .devcontainer/
  3. .gemini/
  4. .github/
  5. docs/
  6. examples/
  7. scripts/
  8. site/
  9. src/
  10. third_party/
  11. tools/
  12. .bazelrc
  13. .bazelversion
  14. .gitattributes
  15. .gitignore
  16. AUTHORS
  17. bazel_downloader.cfg
  18. BUILD
  19. CHANGELOG.md
  20. CODE_OF_CONDUCT.md
  21. CODEOWNERS
  22. combine_distfiles.py
  23. combine_distfiles_to_tar.sh
  24. compile.sh
  25. CONTRIBUTING.md
  26. CONTRIBUTORS
  27. distdir.bzl
  28. extensions.bzl
  29. LICENSE
  30. maven_install.json
  31. MODULE.bazel
  32. MODULE.bazel.lock
  33. pyproject.toml
  34. README.md
  35. repositories.bzl
  36. requirements.txt
  37. SECURITY.md
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