Fix action key staleness for Args due to type confusion

When a command line item is subject to special default stringification behavior (currently, `Label` and `File` instances are), it does not suffice to fingerprint the information that computes the custom stringification; it is also necessary to track whether each individual item is subject to this special formatting. Otherwise, as demonstrated by numerous new test cases, command line items have identical fingerprints to their naive stringification, but may result in distinct command lines.

This is fixed by tracking element types via additional UUID markers, either individually or for entire `NestedSet`s based on the `Depset` type.

Closes #21999.

PiperOrigin-RevId: 627040284
Change-Id: Id0725e7d7a58b439fde4f6644de09ebedb56a14c
3 files changed
tree: 1431cac7b1187e2ebc125979c1785990e13ba042
  1. .bazelci/
  2. .github/
  3. examples/
  4. scripts/
  5. site/
  6. src/
  7. third_party/
  8. tools/
  9. .bazelrc
  10. .bazelversion
  11. .gitattributes
  12. .gitignore
  13. AUTHORS
  14. bazel_downloader.cfg
  15. BUILD
  16. CHANGELOG.md
  17. CODE_OF_CONDUCT.md
  18. CODEOWNERS
  19. combine_distfiles.py
  20. combine_distfiles_to_tar.sh
  21. compile.sh
  22. CONTRIBUTING.md
  23. CONTRIBUTORS
  24. distdir.bzl
  25. extensions.bzl
  26. LICENSE
  27. maven_install.json
  28. MODULE.bazel
  29. MODULE.bazel.lock
  30. rbe_extension.bzl
  31. README.md
  32. repositories.bzl
  33. requirements.txt
  34. SECURITY.md
  35. WORKSPACE
  36. WORKSPACE.bzlmod
  37. workspace_deps.bzl
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