[7.6.0] Fix race condition with multiplex sandboxed workers (#25491)

Prior to this change, multiplex sandboxed workers shared a working
directory per mnemonic. This caused a race condition when a new
multiplex sandboxed worker with the same mnemonic was launched because
when launching it cleaned the working directory. That could cause
problems for any actions executing in that directory.

This change makes it so each multiplex sandbox worker process has a
unique working directory. It does so while ensuring each
SandboxedWorkerProxy and the associated sandbox are still associated
with the correct multiplexer process and working directory.

Resolves #22589

I couldn't figure out if the Bazel repo has an autoformatter somewhere,
so I did my best to manually format the code with a style that follows
the existing code.

Closes #25400.

PiperOrigin-RevId: 732256101
Change-Id: If8deea240fda77780feaeac352cf099fb9bfcee3 (cherry picked from
commit d54fc621563ca501cee11dbff1c46649ff4b7e55)

Fixes #25460

Co-authored-by: jjudd <james@lab-y.com>
4 files changed
tree: e90ac2d72c1c4a7811abd057cceccaa88da57de5
  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. distdir_deps.bzl
  26. extensions.bzl
  27. LICENSE
  28. maven_install.json
  29. MODULE.bazel
  30. MODULE.bazel.lock
  31. rbe_extension.bzl
  32. README.md
  33. repositories.bzl
  34. requirements.txt
  35. SECURITY.md
  36. WORKSPACE
  37. WORKSPACE.bzlmod
  38. workspace_deps.bzl
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