Add kmmlu multiple-choice(accuracy) task (#2849)

lm_eval/tasks/kmmlu/default/kmmlu_mechanical_engineering.yaml

+dataset_name: Mechanical-Engineering
+include: _default_kmmlu_yaml
+task: kmmlu_mechanical_engineering
+tag: kmmlu_stem_tasks

lm_eval/tasks/kmmlu/default/kmmlu_nondestructive_testing.yaml

+dataset_name: Nondestructive-Testing
+include: _default_kmmlu_yaml
+task: kmmlu_nondestructive_testing
+tag: kmmlu_applied_science_tasks

lm_eval/tasks/kmmlu/default/kmmlu_patent.yaml

+dataset_name: Patent
+include: _default_kmmlu_yaml
+task: kmmlu_patent
+tag: kmmlu_other_tasks

lm_eval/tasks/kmmlu/default/kmmlu_political_science_and_sociology.yaml

+dataset_name: Political-Science-and-Sociology
+include: _default_kmmlu_yaml
+task: kmmlu_political_science_and_sociology
+tag: kmmlu_humss_tasks

lm_eval/tasks/kmmlu/default/kmmlu_psychology.yaml

+dataset_name: Psychology
+include: _default_kmmlu_yaml
+task: kmmlu_psychology
+tag: kmmlu_humss_tasks

lm_eval/tasks/kmmlu/default/kmmlu_public_safety.yaml

+dataset_name: Public-Safety
+include: _default_kmmlu_yaml
+task: kmmlu_public_safety
+tag: kmmlu_other_tasks

lm_eval/tasks/kmmlu/default/kmmlu_railway_and_automotive_engineering.yaml

+dataset_name: Railway-and-Automotive-Engineering
+include: _default_kmmlu_yaml
+task: kmmlu_railway_and_automotive_engineering
+tag: kmmlu_applied_science_tasks

lm_eval/tasks/kmmlu/default/kmmlu_real_estate.yaml

+dataset_name: Real-Estate
+include: _default_kmmlu_yaml
+task: kmmlu_real_estate
+tag: kmmlu_other_tasks

lm_eval/tasks/kmmlu/default/kmmlu_refrigerating_machinery.yaml

+dataset_name: Refrigerating-Machinery
+include: _default_kmmlu_yaml
+task: kmmlu_refrigerating_machinery
+tag: kmmlu_other_tasks

lm_eval/tasks/kmmlu/default/kmmlu_social_welfare.yaml

+dataset_name: Social-Welfare
+include: _default_kmmlu_yaml
+task: kmmlu_social_welfare
+tag: kmmlu_humss_tasks

lm_eval/tasks/kmmlu/default/kmmlu_taxation.yaml

+dataset_name: Taxation
+include: _default_kmmlu_yaml
+task: kmmlu_taxation
+tag: kmmlu_humss_tasks

lm_eval/tasks/kmmlu/default/kmmlu_telecommunications_and_wireless_technology.yaml

+dataset_name: Telecommunications-and-Wireless-Technology
+include: _default_kmmlu_yaml
+task: kmmlu_telecommunications_and_wireless_technology
+tag: kmmlu_applied_science_tasks