Increase limits for which Rust standard library sort is used.

[ghuls]

As sort implementations in the Rust standard library are replaced:
rust-lang/rust#124032

with:
https://github.com/Voultapher/sort-research-rs/blob/main/writeup/driftsort_introduction/text.md
https://github.com/Voultapher/sort-research-rs/blob/main/writeup/ipnsort_introduction/text.md

The limit for switching to the default rust sort probably should be increased:

All sorts fallback on the [PDQ sort](https://github.com/stjepang/pdqsort) (Rust Unstable sort) for very small inputs or on Rust (stable) sort for stable sorts.