Merge branch 'wmt' of https://github.com/EleutherAI/lm-evaluation-harness into wmt

lm_eval/tasks/xstorycloze/default_id.yaml

+include: default_ar.yaml
+task: xstorycloze_id
+dataset_name: id

lm_eval/tasks/xstorycloze/default_my.yaml

+include: default_ar.yaml
+task: xstorycloze_my
+dataset_name: my

lm_eval/tasks/xstorycloze/default_ru.yaml

+include: default_ar.yaml
+task: xstorycloze_ru
+dataset_name: ru

lm_eval/tasks/xstorycloze/default_sw.yaml

+include: default_ar.yaml
+task: xstorycloze_sw
+dataset_name: sw

lm_eval/tasks/xstorycloze/default_te.yaml

+include: default_ar.yaml
+task: xstorycloze_te
+dataset_name: te

lm_eval/tasks/xstorycloze/default_zh.yaml

+include: default_ar.yaml
+task: xstorycloze_zh
+dataset_name: zh