bazel_8: init at 8.0.0

[boltzmannrain]

Started with copying bazel_7 and adapted it, notable changes:

• bazelDeps now builds on Darwin in sandbox=true which was previously failing on power management tweaks
• using lndir -silent for less build logs
• had to disable module_deps feature to avoid getting .. does not depend on a module exporting .. errors on clang/macos importing intrinsics
• on macos adding -fno-aligned-allocation on sdk <10.13 to avoid build error saying it isn't supported on <10.13

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 25.05 Release Notes (or backporting 24.11 and 25.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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[boltzmannrain]

@ofborg build bazel_8

[boltzmannrain]

on x86_64-darwin following looks like a build agent setup issue?

       > FATAL: mkdir('/var/tmp/_bazel__nixbld1'): (error: 13): Permission denied