[python] fix haerae tasks (#2112)

lm_eval/tasks/haerae/_haerae.yaml

 group: haerae
 task:
-  - haerae_gk
-  - haerae_hi
-  - haerae_lw
-  - haerae_rw
-  - haerae_sn
+  - haerae_general_knowledge
+  - haerae_history
+  - haerae_loan_word
+  - haerae_rare_word
+  - haerae_standard_nomenclature
 aggregate_metric_list:
   - metric: acc
     aggregation: mean

lm_eval/tasks/haerae/haerae_gk.yaml

-"dataset_name": "general_knowledge"
-"include": "_default_haerae_yaml"
-"task": "haerae_general_knowledge"
+dataset_name: general_knowledge
+include: _default_haerae_yaml
+task: haerae_general_knowledge

lm_eval/tasks/haerae/haerae_hi.yaml

-"dataset_name": "history"
-"include": "_default_haerae_yaml"
-"task": "haerae_history"
+dataset_name: history
+include: _default_haerae_yaml
+task: haerae_history

lm_eval/tasks/haerae/haerae_lw.yaml

-"dataset_name": "loan_words"
-"include": "_default_haerae_yaml"
-"task": "haerae_loan_word"
+dataset_name: loan_words
+include: _default_haerae_yaml
+task: haerae_loan_word

lm_eval/tasks/haerae/haerae_rw.yaml

-"dataset_name": "rare_words"
-"include": "_default_haerae_yaml"
-"task": "haerae_rare_word"
+dataset_name: rare_words
+include: _default_haerae_yaml
+task: haerae_rare_word

lm_eval/tasks/haerae/haerae_sn.yaml

-"dataset_name": "standard_nomenclature"
-"include": "_default_haerae_yaml"
-"task": "haerae_standard_nomenclature"
+dataset_name: standard_nomenclature
+include: _default_haerae_yaml
+task: haerae_standard_nomenclature