Add flag to skip early base extraction

This adds a flag to the installer to skip uncompressing the base image during installation.

Uncompressing the base image during installation can be problematic:
1. If you configure the startup option `output_user_root` you'll wind up extracting the image twice. Once during installation and a second time during the first bazel invocation in your project.
2. If you're bootstrapping Bazel in a controlled environment (in my case via Nix) then you can get permission errors if Bazel defaults to extracting to the home directory. There's no way to skip this extraction and for the time being I have resorted to seting `HOME` to a throw away directory during install.

Closes #5303.

PiperOrigin-RevId: 201004235
1 file changed
tree: e579569b8435f580302f6ec37f42720bd21bd4d1
  1. .bazelci/
  2. examples/
  3. scripts/
  4. site/
  5. src/
  6. third_party/
  7. tools/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. BUILD
  12. CHANGELOG.md
  13. combine_distfiles.py
  14. combine_distfiles_to_tar.sh
  15. compile.sh
  16. CONTRIBUTING.md
  17. CONTRIBUTORS
  18. distdir.bzl
  19. ISSUE_TEMPLATE.md
  20. LICENSE
  21. README.md
  22. WORKSPACE
README.md

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