[DO NOT MERGE] Crate local distributed slice

[jdonszelmann]

Just an experiment I've been working on, DO NOT MERGE, DO NOT REVIEW

[rust-log-analyzer]

The job aarch64-gnu-llvm-19-2 failed! Check out the build log: (web) (plain)

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tidy check
`eslint` doesn't seem to be installed. Skipping tidy check for JS files.
You can install it using `npm install eslint@8.6.0`
tidy: Skipping binary file check, read-only filesystem
##[error]tidy error: /checkout/compiler/rustc_builtin_macros/src/distributed_slice.rs:32: TODO is used for tasks that should be done before merging a PR; If you want to leave a message in the codebase use FIXME
some tidy checks failed
Command has failed. Rerun with -v to see more details.
Build completed unsuccessfully in 0:00:57
  local time: Sun Jun  1 00:19:39 UTC 2025
  network time: Sun, 01 Jun 2025 00:19:39 GMT
##[error]Process completed with exit code 1.
Post job cleanup.

[bors]

☔ The latest upstream changes (presumably #141869) made this pull request unmergeable. Please resolve the merge conflicts.