Audit Rust dependencies for version updates or replacements

[sureshjoshi]

There is an outstanding PR for removing/moving unused dependencies, but this is a separate suggestion to look at dependencies that may be stale, or may have been moved to stdlib.

The simplest example, Tokio moved from num_cpus to std::thread::available_parallelism, so that could be something worth looking at.

Also, lazy_static has proposed a std alternative that could be looked into.

[sureshjoshi]

See PR #22015