[sandbox] Run sandbox from common execroot

Make sandboxed process run under main execroot instead of unique sandboxed execroot. This way, we do not need to copy/symlink input files before execution and clean up sandbox base after execution.

Summary of how it works:

- `windows-sandbox` blocks all file access under current directory (main execroot).
- Declared input paths will be marked readable.
- Declared output paths will be marked writable.
- If sandboxed process tries to open file for read/write when the path is not marked with that permission, the operation will fail (e.g. `fopen` will return `nullptr`).

Closes #8849.

PiperOrigin-RevId: 257408096
5 files changed
tree: e6e7dc31348cff669bf58b02007bd546e0ae3ae0
  1. .bazelci/
  2. examples/
  3. scripts/
  4. site/
  5. src/
  6. third_party/
  7. tools/
  8. .bazelrc
  9. .gitattributes
  10. .gitignore
  11. AUTHORS
  12. BUILD
  13. CHANGELOG.md
  14. CODEOWNERS
  15. combine_distfiles.py
  16. combine_distfiles_to_tar.sh
  17. compile.sh
  18. CONTRIBUTING.md
  19. CONTRIBUTORS
  20. distdir.bzl
  21. ISSUE_TEMPLATE.md
  22. LICENSE
  23. README.md
  24. WORKSPACE
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