switch mmlu variants over to using

lm_eval/tasks/mmlu/default/mmlu_moral_disputes.yaml

 "dataset_name": "moral_disputes"
 "description": "The following are multiple choice questions (with answers) about moral\
   \ disputes.\n\n"
-"group": "mmlu_humanities_tasks"
+"tag": "mmlu_humanities_tasks"
 "include": "_default_template_yaml"
 "task": "mmlu_moral_disputes"
 "task_alias": "moral_disputes"

lm_eval/tasks/mmlu/default/mmlu_moral_scenarios.yaml

 "dataset_name": "moral_scenarios"
 "description": "The following are multiple choice questions (with answers) about moral\
   \ scenarios.\n\n"
-"group": "mmlu_humanities_tasks"
+"tag": "mmlu_humanities_tasks"
 "include": "_default_template_yaml"
 "task": "mmlu_moral_scenarios"
 "task_alias": "moral_scenarios"

lm_eval/tasks/mmlu/default/mmlu_nutrition.yaml

 "dataset_name": "nutrition"
 "description": "The following are multiple choice questions (with answers) about nutrition.\n\
   \n"
-"group": "mmlu_other_tasks"
+"tag": "mmlu_other_tasks"
 "include": "_default_template_yaml"
 "task": "mmlu_nutrition"
 "task_alias": "nutrition"

lm_eval/tasks/mmlu/default/mmlu_philosophy.yaml

 "dataset_name": "philosophy"
 "description": "The following are multiple choice questions (with answers) about philosophy.\n\
   \n"
-"group": "mmlu_humanities_tasks"
+"tag": "mmlu_humanities_tasks"
 "include": "_default_template_yaml"
 "task": "mmlu_philosophy"
 "task_alias": "philosophy"

lm_eval/tasks/mmlu/default/mmlu_prehistory.yaml

 "dataset_name": "prehistory"
 "description": "The following are multiple choice questions (with answers) about prehistory.\n\
   \n"
-"group": "mmlu_humanities_tasks"
+"tag": "mmlu_humanities_tasks"
 "include": "_default_template_yaml"
 "task": "mmlu_prehistory"
 "task_alias": "prehistory"

lm_eval/tasks/mmlu/default/mmlu_professional_accounting.yaml

 "dataset_name": "professional_accounting"
 "description": "The following are multiple choice questions (with answers) about professional\
   \ accounting.\n\n"
-"group": "mmlu_other_tasks"
+"tag": "mmlu_other_tasks"
 "include": "_default_template_yaml"
 "task": "mmlu_professional_accounting"
 "task_alias": "professional_accounting"

lm_eval/tasks/mmlu/default/mmlu_professional_law.yaml

 "dataset_name": "professional_law"
 "description": "The following are multiple choice questions (with answers) about professional\
   \ law.\n\n"
-"group": "mmlu_humanities_tasks"
+"tag": "mmlu_humanities_tasks"
 "include": "_default_template_yaml"
 "task": "mmlu_professional_law"
 "task_alias": "professional_law"

lm_eval/tasks/mmlu/default/mmlu_professional_medicine.yaml

 "dataset_name": "professional_medicine"
 "description": "The following are multiple choice questions (with answers) about professional\
   \ medicine.\n\n"
-"group": "mmlu_other_tasks"
+"tag": "mmlu_other_tasks"
 "include": "_default_template_yaml"
 "task": "mmlu_professional_medicine"
 "task_alias": "professional_medicine"

lm_eval/tasks/mmlu/default/mmlu_professional_psychology.yaml

 "dataset_name": "professional_psychology"
 "description": "The following are multiple choice questions (with answers) about professional\
   \ psychology.\n\n"
-"group": "mmlu_social_sciences_tasks"
+"tag": "mmlu_social_sciences_tasks"
 "include": "_default_template_yaml"
 "task": "mmlu_professional_psychology"
 "task_alias": "professional_psychology"

lm_eval/tasks/mmlu/default/mmlu_public_relations.yaml

 "dataset_name": "public_relations"
 "description": "The following are multiple choice questions (with answers) about public\
   \ relations.\n\n"
-"group": "mmlu_social_sciences_tasks"
+"tag": "mmlu_social_sciences_tasks"
 "include": "_default_template_yaml"
 "task": "mmlu_public_relations"
 "task_alias": "public_relations"

lm_eval/tasks/mmlu/default/mmlu_security_studies.yaml

 "dataset_name": "security_studies"
 "description": "The following are multiple choice questions (with answers) about security\
   \ studies.\n\n"
-"group": "mmlu_social_sciences_tasks"
+"tag": "mmlu_social_sciences_tasks"
 "include": "_default_template_yaml"
 "task": "mmlu_security_studies"
 "task_alias": "security_studies"

lm_eval/tasks/mmlu/default/mmlu_sociology.yaml

 "dataset_name": "sociology"
 "description": "The following are multiple choice questions (with answers) about sociology.\n\
   \n"
-"group": "mmlu_social_sciences_tasks"
+"tag": "mmlu_social_sciences_tasks"
 "include": "_default_template_yaml"
 "task": "mmlu_sociology"
 "task_alias": "sociology"

lm_eval/tasks/mmlu/default/mmlu_us_foreign_policy.yaml

 "dataset_name": "us_foreign_policy"
 "description": "The following are multiple choice questions (with answers) about us\
   \ foreign policy.\n\n"
-"group": "mmlu_social_sciences_tasks"
+"tag": "mmlu_social_sciences_tasks"
 "include": "_default_template_yaml"
 "task": "mmlu_us_foreign_policy"
 "task_alias": "us_foreign_policy"

lm_eval/tasks/mmlu/default/mmlu_virology.yaml

 "dataset_name": "virology"
 "description": "The following are multiple choice questions (with answers) about virology.\n\
   \n"
-"group": "mmlu_other_tasks"
+"tag": "mmlu_other_tasks"
 "include": "_default_template_yaml"
 "task": "mmlu_virology"
 "task_alias": "virology"

lm_eval/tasks/mmlu/default/mmlu_world_religions.yaml

 "dataset_name": "world_religions"
 "description": "The following are multiple choice questions (with answers) about world\
   \ religions.\n\n"
-"group": "mmlu_humanities_tasks"
+"tag": "mmlu_humanities_tasks"
 "include": "_default_template_yaml"
 "task": "mmlu_world_religions"
 "task_alias": "world_religions"

lm_eval/tasks/mmlu/flan_cot_zeroshot/mmlu_abstract_algebra.yaml

 "dataset_name": "abstract_algebra"
 "description": "The following are multiple choice questions (with answers) about abstract\
   \ algebra.\n\n"
-"group": "mmlu_flan_cot_zeroshot_stem"
+"tag": "mmlu_flan_cot_zeroshot_stem"
 "include": "_mmlu_flan_cot_zeroshot_template_yaml"
 "task": "mmlu_flan_cot_zeroshot_abstract_algebra"

lm_eval/tasks/mmlu/flan_cot_zeroshot/mmlu_anatomy.yaml

 "dataset_name": "anatomy"
 "description": "The following are multiple choice questions (with answers) about anatomy.\n\
   \n"
-"group": "mmlu_flan_cot_zeroshot_stem"
+"tag": "mmlu_flan_cot_zeroshot_stem"
 "include": "_mmlu_flan_cot_zeroshot_template_yaml"
 "task": "mmlu_flan_cot_zeroshot_anatomy"

lm_eval/tasks/mmlu/flan_cot_zeroshot/mmlu_astronomy.yaml

 "dataset_name": "astronomy"
 "description": "The following are multiple choice questions (with answers) about astronomy.\n\
   \n"
-"group": "mmlu_flan_cot_zeroshot_stem"
+"tag": "mmlu_flan_cot_zeroshot_stem"
 "include": "_mmlu_flan_cot_zeroshot_template_yaml"
 "task": "mmlu_flan_cot_zeroshot_astronomy"

lm_eval/tasks/mmlu/flan_cot_zeroshot/mmlu_business_ethics.yaml

 "dataset_name": "business_ethics"
 "description": "The following are multiple choice questions (with answers) about business\
   \ ethics.\n\n"
-"group": "mmlu_flan_cot_zeroshot_other"
+"tag": "mmlu_flan_cot_zeroshot_other"
 "include": "_mmlu_flan_cot_zeroshot_template_yaml"
 "task": "mmlu_flan_cot_zeroshot_business_ethics"

lm_eval/tasks/mmlu/flan_cot_zeroshot/mmlu_clinical_knowledge.yaml

 "dataset_name": "clinical_knowledge"
 "description": "The following are multiple choice questions (with answers) about clinical\
   \ knowledge.\n\n"
-"group": "mmlu_flan_cot_zeroshot_other"
+"tag": "mmlu_flan_cot_zeroshot_other"
 "include": "_mmlu_flan_cot_zeroshot_template_yaml"
 "task": "mmlu_flan_cot_zeroshot_clinical_knowledge"