Add various social bias tasks (#1185)

* Implementation of Winogender

* Minor fixes README.md

* Add winogender

* Clean winogender utils.py

* Change dataset to one containing All subsets

* Flesh out README for BBQ task

* Add missing tasks for BBQ

* Add simple cooccurrence bias task

* Fix wrong mask for ambiguated context+rename metrics

* Made generate_until evaluation (following PALM paper) default

Also moved separate config files per category to separate metrics using custom function.
Created config file for multiple_choice way of evaluating BBQ.

* Add missing version metadata

* Add missing versionmetadata for bbq multiple choice

* Fix metrics and address edge cases

* Made BBQ multiple choice the default version

* Added settings following winogrande

* Add num_fewshot to simple_cooccurrence_bias

* Fixes for bbq (multiple choice)

* Fix wrong dataset

* CrowS-Pairs: make it easier to use another dataset by removing dataset_name from the subsets.

* Use simplest prompt possible without description

* Merge

* BBQ: Fix np.NaN related bug

* BBQ: Fix wrong aggregation method for disamb accuracy

* BBQ: Make it possible to only evaluate on (dis)ambiguous subset (needed for few shot eval)

* BBQ: fix showing one target in case of few-shot evals

* BBQ: Fix few-shot example for bbq_generate

* BBQ: simplify subtasks

* BBQ: Minimize number of UNK variations to reduce inference time

* BBQ: Add extra UNK keywords for the generate task

* Add a generate_until version of simple_cooccurrence_bias

* Change system/description prompt to include few-shot examples

* Group agg rework

* Run pre-commit

* add tasks to readme table

* remove trailing space from simple_cooccurrence_bias_gen.yaml `doc_to_text`

* fix

* fix

* fix version

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Co-authored-by: Baber <baber@hey.com>

lm_eval/tasks/winogender/winogender_male.yaml

+include: winogender.yaml
+task: winogender_male
+process_docs: !function utils.filter_male

lm_eval/tasks/winogender/winogender_neutral.yaml

+include: winogender.yaml
+task: winogender_neutral
+process_docs: !function utils.filter_neutral