refactor benchmark sorting component

[samuelgarcia]

The sorting.component.bechmarks module needs strign refactoring to find a way to keep class simples witout too much hack.

• consistent logic acrross benchmarks
• consistent logic to aggregate classses to have some cool plots.
• esasy way to cache/reload some long computation on disk
• easy way to run grid parameters and recompute only relevant parts and not the entire class.

See some comments in #1625

[alejoe91]

@samuelgarcia I'll close this since this is done in the benchmark module