[stdlib] Introduce alternative list sorting for scalar and order comparable elements

[mzaks]

This is a big PR which addresses #2390 and makes following PRs: https://github.com/modularml/mojo/pull/2517 https://github.com/modularml/mojo/pull/2378 https://github.com/modularml/mojo/pull/2409

obsolete.

It replaces the recently introduced builtin/sort module. I suppose that the replacement should not be problematic as the legacy sort module was introduced due to discussion in #2390 and is not used anywhere in the code base as far as I can tell.