fix: support ls -n on Windows NFS

[a-rookie-of-C-language]

Summary

• Fix ls -n on Windows NFS filesystems by reading the NfsV3Attributes EA exposed by Services for UNIX compatible NFS drivers.
• Use the NFS uid/gid values for Windows numeric owner/group display.
• Cache numeric uid/gid per ls entry to avoid repeated EA queries.

Validation

• cargo check --manifest-path deps\coreutils\Cargo.toml -p uu_ls
• cargo run --manifest-path deps\coreutils\Cargo.toml -p uu_ls -- -n src\main.rs

[cakebaker]

@a-rookie-of-C-language your PR contains many unrelated commits.

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/cut/bounded-memory (fails in this run but passes in the 'main' branch)
Congrats! The gnu test tests/cp/link-heap is now passing!
Congrats! The gnu test tests/tail/pipe-f is now passing!