Decouple events:events from Starlark eval and syntax.

Split `Location` and `SyntaxError` into dedicated `location` and `syntax_error` build targets in `net/starlark/java/syntax` (re-exported by `:syntax`), and extract `PrintHandler` into a top-level `net.starlark.java.eval.PrintHandler` interface in its own `print_handler` build target in `net/starlark/java/eval` (re-exported by `:eval`).

`PrintHandler` is decoupled from `StarlarkThread` via `PrintHandler.StarlarkThreadInfo`, which exposes `getCallerLocation()` and is implemented by `StarlarkThread`. `StarlarkThread.PrintHandler` is retained as a transitional subinterface while external callers migrate.

Update `//src/main/java/com/google/devtools/build/lib/events:events` to depend only on `net/starlark/java/eval:print_handler`, `net/starlark/java/syntax:location`, and `net/starlark/java/syntax:syntax_error` instead of the full Starlark `eval` and `syntax` packages.

PiperOrigin-RevId: 1013382020
Change-Id: Ibb816e348a3e90c6413f5e8c21c527264a8321ba
7 files changed
tree: eb1cfcfe42ed7c81bd06941419772bccb2e6b638
  1. .bazelci/
  2. .devcontainer/
  3. .gemini/
  4. .github/
  5. docs/
  6. examples/
  7. scripts/
  8. src/
  9. third_party/
  10. tools/
  11. .bazelrc
  12. .bazelversion
  13. .gitattributes
  14. .gitignore
  15. AGENTS.md
  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. oneversion_allowlist.csv
  34. oneversion_allowlist_for_tests.csv
  35. pyproject.toml
  36. README.md
  37. repositories.bzl
  38. requirements.txt
  39. SECURITY.md
  40. verify_module_bazel_lock.sh
README.md

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