Registry refactorisation (#937)
* init, wip
* unrelated but these tasks were buggy
* better suite management: we don't load all optional deps all the time
* upgrade
* singleton + transformer sampling fix in config
* incredible how much code was just pulled from ifeval
* fix test 1
* fix test 2
* fix tests part 1 - also removes fewshot truncation in the task name because it's no longer used anywhere in the code logically
* fix registry mockup
* fixed last tests
* remove ifbench
* allow old task name but logs a warning
* Update tests/utils.py
* Update src/lighteval/tasks/registry.py
* Update src/lighteval/tasks/registry.py
Co-authored-by: Nathan Habib <30601243+NathanHB@users.noreply.github.com>
* Update src/lighteval/tasks/registry.py
* style
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Co-authored-by: Nathan Habib <30601243+NathanHB@users.noreply.github.com>
